Fuck her without hesitation

Now that you understand the situation you find it surprisingly easy to put your feelings of friendship aside. After all, this isn't Aliyah - not really. The girl you knew is still miles away, and judging from what you just heard she would have no way of knowing how well or poorly you were treating this artificial substitute.

...So you skip the preamble. Your hands start kneading at her pale, heaving tits without reservation, and you find them to be just as soft, fleshy and yielding as any you'd felt before in the course of your brief erotic history. Thankfully, Aliyah is showing signs of being just as inexperienced, if not moreso; she trembles and whines, crying out each time you thumb at her sensitive nipples.

Then, as if she'd read your mind, her shy eyes meet yours:

"I-I'm still a virgin," she huffs, looking flushed and **** as you continue to mould her tits like putty, "...But you can do what you want with me, Zack... As long as it's y--"

Her words are lost in a squeak of pained ecstasy; you'd been fumbling with your fly during her short disclaimer, of course, and had used that time to get your dick out and penetrate the babbling brunette without warning. She flails a little at first, but you react by angling forward to pin her up against the vaguely egg-shaped container in which she'd arrived. You muffle her pained cries with a deep, insistent kiss, hips churning as you proceed to fuck away your Love Doll's virginity.

Another loud, tearful cry and the warm trickle issuing from your melded genitals serve as indicators of your success. Rather than rest on your laurels, though, you probe even more deeply between Elizabeth's slick, inviting folds. Her sex contracts violently around you, but neither this nor her exhausted pleas of "Wait!" or "Slower, PLEASE!" are enough to deter you from pounding that pussy into oblivion!

Your hands paw hungrily at her stacked-and-slender frame, alternating between groping at her softest regions and forcing her deeper in your lap. Your artificial fuck buddy continues to sniff and wail, but her legs are cinched around your waist, and you can feel her toes curling against your lower back with every thrust. A few ass-slaps and nipple-tweaks later and you're nutting inside her like an onahole; you hold her flush to your loins until your balls are good and drained, paying little mind to your partner's breathless, quivering state until your orgasm has fully subsided...

When you finally do get around to looking at her, though, all you see smeared lipstick, runny mascara... And a dazed smile on her slutty face.