Messily, of course.

Your balls clench and your thick dick throbs with a long, hot flush of pleasure through your nerves: you didn't expect to cum, and you do it for a long time-! Your hands tense and unsteadily grasp at Tantha's sides and asscheeks as you push in as deep as you can, shooting your hot cum up into her uterus- you think you actually feel her cervix dilate to suck your seed into her womb.

But Tantha isn't far behind either: while her twat hungrily milks your seed, she drops down onto Noire to rest her heavy tits on the elf's back, then with the three of you pressed together your ballsacks touch again. You can feel them clench to pump fresh sperm to inseminate Noire with.

The two of you almost collapse as Noire wobbles and squirms- "Ahhh no ff-uh, you came inside?! -rrff, unh, ooohh~" She complains, but also moans as gouts of hot semen flood the elf's tender pussy: she'd lost her virginity and been fucked twice in the same day, and now both you and Tantha had a chance of knocking the poor girl up.

As strong and libidinous as she was, you're sure Tantha is probably risking that for herself too. "Let it all out. Don't pull out until I have every drop, Erik." Instructs the dusky amazon.