Does one pull out or drain your fertile nut deep

Okay...so You could not resist the urge to find out your action-sis bare. It commences off as playful sexual pressure, but then as her apparel begin to arrive off... it gets extremely actual! Your brain is telling you this is not suitable, but your inside primal instincts would not halt her as she starts to stroke your tough cock. Before you comprehend sex movies it, she opens her mouth, and you're feeling her tongue all around your tip... then her legs distribute as she guides your throbbing meat into her swollen moist vagina. It’s all happening so speedy; you’re pounding her as she moans!! Your balls swell up with cum, and you simply hear your step-sis say...cum within me! Do you pull out or drain your fertile nut deep within her?