A doe in her early 20's is searching through the woods for edible mushrooms, particularly chicken of the woods. Soon into her search she spots the charismatic orange color of the mushrooms on an old tree, “this will go well in my soup tonight” she thinks to herself. When she is cutting the mushroom from the tree she hears a low thumping sound from deeper in the woods. Unnerved, she puts the orange mushrooms in her basket with the rest of her foraged goodies and begins her walk back to her house. She speeds up to a power walk as she hears more odd noises like a faint but deep chattering sound following her as she walks.
She feels deeply relieved as she closes her door behind her and locks it, going into the kitchen and putting her basket on the counter. Feeling hungry she starts on her vegetarian chicken soup, using the mushrooms as a chicken substitute. As she is chopping up the wild onions and mushrooms she found in the woods she hears that chattering again, this time from her yard. But when she looks through the window she sees nothing, she blames her nerves on hearing the sound again and continues her cooking. 
The soup turned out lovely, a warm and hardy vegetarian take on chicken soup and as she is spooning in another mouthful she hears a thumping on her back door. In fright she goes for her bedroom where she keeps her revolver for self defense her hooves making a loud tapping sound as she bolts up the steps, the sound also alerting what's outside to her presence.
She closes her bedroom door behind her and retrieves the revolver from the nightstand, her hands trembling as she hears her backdoor give way and whatever has been stalking her break in and come up the stairs with a loud clanking sound on the hardwood stairs. She readies the revolver at the door but what happens next is so fast she does not get the opportunity to shoot as her bedroom door explodes from the force of the nightmarish insectoid creature charging into it. The creature who resembles a massive grasshopper but wrong in many ways pins the doe on the carpeted floor of her bedroom.
With her body pinned and arms held down the doe can do nothing but cry as she looks up at the insectoid's eyes and mandibles. The creature looks over her and taps her with its antennas, examining her before it notices an enticing smell. The doe had urinated in her fright, it seeping out from her panties and sweatpants. The insectoid lowers its mandibles to her crotch, its long flexible yet strong arms keeping the struggling doe pinned. The doe was terrified as the insectoid put her crotch in its mouth and chewed away her urine stained lower wear carefully, and no matter what she did nothing would stop the creature from tasting its prey as its long tongue plunges into her virgin tunnel. 
The doe lets out a terrible scream as her tunnel is parted with no preparation or foreplay as pain radiates from her crotch the creature finds what it was looking for, the entrance to the doe’s womb confirming to the insectoid monster that this prey would be a suitable host.
What comes next will make the pain the doe feels from the creature tongue seem downright pleasant in comparison as it lowers its cloaca at the end of its abdomen to her vaginal tunnel. When the two orifices meet the cloaca blooms open in a 4 leaf clover like pattern within the does writhing tunnel. The stretching of her tunnel far wider than any male could possibly do brings astronomical levels of pain the doe screaming in agony and crying but her suffering does not stop there as the creature's cloaca begins to unroll within her and reaches her cervix. The prolapsing cloaca bumps right up against the barrier to her womb and meets resistance to entering as the cervix only dilates during birth and this doe has never even had and fawns. This does not stop the creature's cloaca from building up enough pressure to force its way through the cervix bringing a whole new world of pain into the doe’s deepest part of her womanhood. She tries to fight but can't even budge the insectoid above her as she begs the gods to help her, but alas they seem to not hear her. The creature's abdomen pulsates as eggs are forced down its reproductive tract and into its prolapsed cloaca, with a splurting sound and a gush of mucus an egg the size of a grapefruit is forced through her cervix and into her awaiting womb expanding its untested muscles, this happens 6 more times and when the creature's cloaca rolls back out of the sobbing shivering doe her womb is visibly distended, if someone were to see her without context they would believe her to be in the early stages of pregnancy.
Holding the doe down it changes position over her, its cloaca hovering above her left arm and with a sound of flatulences it releases sticky mush of feces and mucus onto her limb. This mixture acts like natural concrete, hardening over time to be rock-like in texture, the same process is done to all the doe's limbs, the smell making the doe gag in disgust adding to her suffering. As it hardens she is still held down, a throbbing pain in her womanhood still present and the several eggs a constant pressure within her. 

The next day the doe is stuck in place, the feces mixture keeping her pinned without the need of the insectoid creature present. She can do nothing but have scenario after scenario run through her mind pondering what is to be her fate, will the creature end up eating her? Will the eggs inside her be laid by her? Will they hatch and if so will she birth them or will they …. Eat their way out. She can't help but dwell on that last option, fear making hope hard for her to come up with. Soon the creature returns to the doe, she whimpers and shivers thinking it will violate her again, but it has other plans. It brings its mandibles to her muzzle and guides it into its mouth and with a choking sound regurgitates a slimy and bitter substance into her mouth giving her 2 options, Eat or drown and so the doe reluctantly eats its offerings, the substance being a nutrient excretion meant to keep host feed. The doe has fallen into deep despair now wanting to either be rescued or finally killed by the creature to end her suffering.

This goes on like clockwork for 2 weeks until something changes within the doe. As she lays on the ground, in despair as usual she feels movements in her womb, The Eggs Are Hatching. She screams with fear, hoping she is not about to be eaten from within. Thankfully for her, that is not part of the parasitoids life cycle as the larva writhe around within her they eventually find their way to the walls of her womb and latch on, their little mandibles being used to cut into the wall of flesh and keep the larva secured to it as they drink from her bloodstream in a grotesque mockery of how a mother gives nutrients to babies in the womb. This biting brought unbearable pain to the doe, her most sacred space not just violated but scarred by the creature's young inside of her. When the creature came back from foraging in the woods it noticed the movement in the distended doe’s belly and immediately began feeding her, providing nutrients for both her and its young. 
Unfortunately for the doe, the larva do not only bite once, they unlatch and crawl around the walls of her womb when not feeding providing her a sickening feeling, all those little legs on the fat grubs inside her give her a prickly sensation and when they latch on to her walls to feed again she has to feel the pain of them biting into her all over again.

The next day the doe would make a grotesque discovery about the larva growing inside her, as they eat they produce waste and have no issues dedicating inside her, causing watery larva feces to drip from her sex making her want to barf if she had that much food within her, luckily the creature would clean her as it has been doing for the last few weeks, whenever she urinated or defecated they were there to lap it up and the larval waste was just the same, this still did not bring much comfort to the sobbing doe, who just wished for it to end.

This continued for 3 more weeks, every day the larva in her womb growing larger and larger, if someone were to see her they would believe her to be in the last stage of pregnancy with quadruplets her belly stretched outward with large stretch marks below her fur and the activity of the larva is very visible now as they grind up against the wall of her womb and press their heads against it letting her see an outline on her belly. She wishes they would just leave before she bursts and today she would get her wish, unfortunately for her it won't be pleasant and it won't be the end. The larva within her start their process of exiting their host, they push up against her cervix with force the cervix that had mostly healed since its violent penetration by the creature's cloaca. This was no normal birth, there were no hormones telling the cervix to dilate, just the ramming force of the larva causing the oceans of pain from her initial impregnation to return as she screams her lungs out and blood falls from her vaginal tunnel. The screams bring the insectoid creature back to its host just in time to see the first larva show it's fat brown head from her womanhood, with the creature's help the larva is pulled from the doe and this happens with the six other larva each causing the same amount of pain for the doe. By the end her belly lays flatter than before but still raised by all the extra skin grown during her surrogacy with the larva.

The doe hoped the creature would be happy with the larva turning a dark brown in front of it, the larva beginning the stage of pupation. This hope would be dashed as the insectoid creature lowers its cloaca to her loosened sex and begins the cycle again to the crying and begging of the doe for it to just kill her. But it won't kill her and won't let her die. She has become a broodmother and that is how she will be for the foreseeable future, she will birth hundreds of larva in the future and they will become creatures that will go out and seek new hosts to begin another cycle.