Does one pull out or drain your fertile nut deep

Ok...so You could not resist the urge to determine your move-sis naked. It begins off as playful sexual rigidity, but then as her garments begin to occur off... it gets really serious! Your Mind is telling you this isn't proper, but your inside primal instincts will not likely halt her as she begins to stroke your hard cock. Before you understand it, she opens her mouth, and you are feeling her tongue around your tip... then her legs spread as she guides your throbbing meat into her swollen moist vagina. It’s all taking place so rapid; you’re read more pounding her as she moans!! Your balls swell up with cum, and you listen to your step-sis say...cum inside me! Do you pull out or drain your fertile nut deep inside her?