Does one pull out or drain your fertile nut deep

Okay...so you couldn't resist the urge to view your stage-sis naked. It starts off off as playful sexual stress, but then as her clothes start to appear off... it receives extremely authentic! Your Mind is telling you this isn't proper, but your inside primal instincts will not likely prevent her as she begins to stroke your tough cock. Before you decide to know it, she opens her mouth, and you're feeling her tongue about your tip... then her legs spread here as she guides your throbbing meat into her swollen moist vagina. It’s all occurring so quick; you’re pounding her as she moans!! Your balls swell up with cum, so you listen to your action-sis say...cum inside of me! Does one pull out or drain your fertile nut deep within her?