How could she not?

Sara shivered as she looked down into her mother, her cock distorting out her belly wantonly. Her cock was barely a few hours old, but attached as if she was born with it, now buried in the place she was born from. The muscular walls of her mother's pussy gripped her base, and the tight ring of her cervix gripped around her shaft. As she pumped away, she sometimes pulled back and out enough to fall out of her inner hole, and pressing back in was always so impossibly tight yet yielding. "Mommy... Your pussy feels so good. Why didn't you let me fuck you before? We could have been fucking for years."

"You little arayotnik, you're not supposed to want to fuck your mommy," Miriam said with a wry smile, massaging her breasts as she ground her hips back and forth, "Little girls like you are supposed to find nice young men their mommies approve of to make babies for. Regardless of your blessings." As she said blessings, Miriam clenched herself around Sara, pressing in deep around her daughter's cock on all sides. Almost absently, Sara grabbed her phone, angling it down at Miriam. Offended, Miriam was about to open her mouth, when the world stopped.

Hovering the phone over her mother's tits, locked mid-bounce, Sara enabled lactation and tied her production to her arousal levels. Basically, any time Miriam thought the slightest of dirty thoughts, she would start spotting, and orgasms would make her tits squirt like she was a bottom in a hentai video. She was about to set down her phone and get back to work when she hesitated. Opening up the relations Miriam had within her mind, Sara saw that she was listed both under familial love and sexual lust, but not under anything romantic. Frowning, she input her name under her list of romantic interests, under her father, but above George Clooney.

Sara unpaused the world and smirked at her mother as she pulled up the camera, leveling at Miriam's face. Her hips pumping away, she recorded her mother as she continued, "Tell me you love me, mommy. Tell me you want me to stay here forever, and breed you time and time again, for the rest of your life." As she pounded, Miriam's tits started to leak milk, splattering both of them in the hot thick cream of a first-time mother.

Miriam didn't care, she looked straight into the camera, panting as she struggled to keep her consciousness in line as she agreed, "Yes baby. Do it, put a baby in your mommy. Fill my womb up with my own grandbabies, I don't care what the world says. I want to keep you all to myself, I want you to stay with me forever. Knock your mommy up, and marry her, make her the breeding whore she always wanted to be. I don't care what your siblings will think. Fuck, I want to see the look on their faces when I tell them who the father of their new sister is going to be."

Sara struggled as her mother talked dirty, and as Miriam went on she managed to drop the phone, stooping down to take one of her mother's milky tits into her mouth, and drinking deep. Miriam let out a surprised but relieved sigh as she felt the familiar but long-since-forgotten sensation of being drained, clutching onto Sara's head as the young woman rutted into her mother. Almost as a manta, Miriam continued, "I love you, baby. Breed your mommy... Put a baby in your own mother. Fuck it into your mommy." And then, all at once, Sara let go.

The first blast of cum flooded Miriam's womb with almost an entire gallon of cum in an instant, the older woman's belly swelling between them, pushing their bodies apart. Letting go of her mother's teat, milk dribbled down Sara's chin as her eyes rolled back, her head twitching as she let out another blast, Miriam's belly now looking like she was well and truly pregnant. Again and again, Sara's balls clenched, and she poured seed into her mother, whose womb couldn't stretch anymore, now backwashing cum between their sweaty and exhausted bodies. All the while, Miriam's tits and cunt squirted their liquids in time with her child's orgasmic waves, Miriam entirely checked out in orgasmic bliss.

For almost a full three minutes, Sara's orgasm continued, before she was shocked back into reality by the sound of a familiar voice from the front door, baffled, "Holy shit... Sara? Mom? What's going on?"