Go all out

Almost without thinking, your hand reaches out to Sophie's crotch, and you start petting her over her panties as you suck her tits. She gasps, loudly. "Yes!"

Emboldened, you keep licking and petting, while at the same time you're thrusting into Kuniko faster and faster. She's sucking hard now, gripping you firmly, and you're almost at your breaking point.

And then you're past it. Face pressed into Sophie's tiny breast, you start ejaculating into Kuniko's mouth, pleasure blasting out of you. She barely even pauses, just for a moment, then continues with exactly the tempo as before, slowing only as your ejaculations slow.

Finally, she pulls you out of her mouth, and looks it you with a serious, but somewhat satisfied expression. A single smear of something transparent on her lower lip is the only clue of what just happened.