Do you pull out or drain your fertile nut deep

Alright...so you couldn't resist the urge to view your stage-sis naked. It starts off off as playful sexual tension, but then as her outfits begin to occur off... it gets quite serious! Your brain is telling you this isn't proper, but your inside primal instincts will not halt her as she begins to stroke your hard cock. Before you realize it, she opens her mouth, and you're feeling her tongue all over your idea... then her legs distribute as she guides your throbbing meat into her swollen soaked vagina. It’s all happening so quick; you’re pounding her as she read more moans!! Your balls swell up with cum, so you hear your phase-sis say...cum within me! Would you pull out or drain your fertile nut deep inside of her?