Does one pull out or drain your fertile nut deep

Ok...so you couldn't resist the urge to find out your step-sis naked. It starts off off as playful sexual tension, but then as her apparel start to arrive off... it gets incredibly actual! Your brain is telling you this is not right, but your inner primal instincts will never halt her as she starts to stroke your difficult cock. Before you comprehend it, she opens her mouth, and you are feeling her tongue around your idea... then her legs spread as she guides your throbbing meat into her swollen damp vagina. It’s all occurring so fast; you’re pounding her as she moans!! Your balls swell up with cum, and you also hear your stage-sis say...cum within me! Would you pull out or drain more info your fertile nut deep inside of her?