Does one pull out or drain your fertile nut deep

Alright...so You could not resist the urge to see your action-sis naked. It commences off as playful sexual rigidity, but then as her clothing begin to occur off... it gets quite serious! Your brain is telling you this isn't appropriate, but your interior primal instincts is not going to prevent her as she begins to stroke your tough cock. Before read more you decide to comprehend it, she opens her mouth, and you are feeling her tongue about your tip... then her legs unfold as she guides your throbbing meat into her swollen moist vagina. It’s all occurring so rapid; you’re pounding her as she moans!! Your balls swell up with cum, and you hear your step-sis say...cum inside me! Do you pull out or drain your fertile nut deep inside her?