Me, my sister and mommy

mommy's breasts are getting so big and full of milk for our baby. at night me and my sister join mommy in bed and suckle on one breast each just like when we were babies. our tongues lick mommy's nipples while we drink her nipples and mommy moans with pleasure. she starts rubbing her clit under the sheets. her moans make me and my sister horny and we start rubbing each others privates. all three of us writhe together under the sheets. i can feel the steamy wetness of my family's genitalia brushing against my hard cock. with her delicate hand my sister guides my dick to mommy's slit and slides it in. mommy moans in surprise. slowly my sister pulls my dick in and out of mommy, using my cock like a dido to fuck mommy. s*s is rubbing her pussy on mommy's leg, humping her like a bitch in heat while she licks mommy's clit. we hump faster and faster until mommy moans "i'm gonna cum, my babies!". just as my sister starts to shake in orgasm, she grabs my full balls and pulls my cock out of mommy, making my shoot load upon load of hot sticky sperm all over my sister's face and dripping onto mommy's shaking belly. sister licks my cum off mommy's pregnant belly, where it had pooled in her belly button. we lay there together, our bodies intwined, shaking and panting. the perfect family.