Give her a drink

Why fight it? You're lying here naked, you've got a gorgeous naked girl giving you what is possibly her first ever blowjob, may as well finish this in spectacular fashion. And by that, you're going to blast your cum right down her throat. You stare down at the bobbing and licking head, planning how to get as much of your seed into her stomach as possible.

Do you grab hold of her head? Do you just lay lazily and let it happen? You run your hands through her long brown hair to test for grip. She likes the stroke, you guess that she thinks you're being affectionate. No way she knows what your plotting. She gives your balls another jolting suckle and you feel your hips lunge up. You're getting close. You're getting closer. You're going to blow.