Does one pull out or drain your fertile nut deep

Alright...so You could not resist the urge to view your stage-sis naked. It starts off off as playful sexual tension, but then as her apparel begin to come off... it gets incredibly real! Your brain is telling you this isn't suitable, but your interior primal instincts is not going to prevent her as she starts to stroke your tough cock. Before 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 check here inside me! Do you pull out or drain your fertile nut deep inside her?