Does one pull out or drain your fertile nut deep

Ok...so You could not resist the urge to check out your phase-sis bare. It starts off as playful sexual pressure, but then as her clothes start to appear off... it receives extremely true! Your Mind is telling you this is not correct, but your inside primal instincts will not end her as she begins to stroke your hard 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 wet vagina. It’s all happening so quickly; you’re pounding her as she moans!! Your balls here swell up with cum, therefore you listen to your move-sis say...cum inside of me! Does one pull out or drain your fertile nut deep inside her?