In her mouth.

With a great grunt of effort, and a wail of protest, you tear yourself out of Terri's pussy. Unbearable pain surges from your loins, and you do the only thing you can to make it stop. Grabbing Terri by the top of her head, you yank her up and force your cock down her throat, sandwiching her head between your couch cushion and your groin.

As your load makes it's trip down straight into her stomach, you look down and meet Terri's gaze. Her eyes could not be more full of elation and happiness. She slides her hands up, one to massage her throat and the other to knead your balls, doing anything she can to get even an extra drip from you. Amazingly, she's not only conscious when you've stopped cumming, but as you start to pull out, she keeps her lips tight around your cock and uses her tongue to clean you up, slurping up the dregs from your tip.

Letting out a long, hot breath, she licks her lips and groans softly, like she's just waking from a dream. Her hand has long since dropped, but you can see it idly playing with her crotch. Her eyes flutter open, and when she recognizes you, she smiles warmly. "That... was definitely... worth the wait..." she gasps weakly, swallowing with difficulty, before drifting off to peaceful sleep.

You on the other hand, are immensely perturbed. Either Terri has an amazing constitution or Selas' meddling has done something to her even more that you initially thought. Also, something odd occurs to you. Instead of feeling invigorated, like you usually do after having sex with a human, as of since you've been stuck with Selas, you're exhausted. It takes you a minute to piece together why.

Shaking your head to clear it, you collect the sleeping Terri and carry her to your bed, where she'll be more comfortable. Still smiling, she rolls over and you grimace, when you see the massive tear you made in her leggings. You are caught between undressing her and leaving her as is, to... let her retain her dignity. It's one thing to undress during sex, and another thing completely to do something when someone is asleep.

While you're looking for a coin to flip, you hear Terri stir slightly. Turning your head, you watch as she mechanically gets out of bed, shimmies off her ruined leggings and getting back into bed, wearing just her thong. In seconds, she's sleeping soundly again. Your decision made for you, you chuck the leggings into the trash, collect all the clothes and put them into the machine. You can run it in the morning. But now you have another choice to make.