Do you pull out or drain your fertile nut deep

Alright...so you couldn't resist the urge to check out your action-sis bare. It starts off off as playful sexual stress, but then as her dresses start to appear off... it receives extremely serious! Your brain is telling you this isn't correct, but your inside primal instincts will never prevent her as she begins to stroke your tricky cock. Before you realize it, she opens her mouth, and you're feeling her tongue all-around your tip... then her legs spread as she guides your throbbing meat into her swollen moist vagina. It’s all taking place so rapid; you’re pounding her as she moans!! Your balls swell adult streaming up with cum, and you hear your phase-sis say...cum within me! Would you pull out or drain your fertile nut deep within her?