Does one pull out or drain your fertile nut deep

Ok...so You could not resist the urge to check out your phase-sis bare. It starts off as playful sexual stress, but then as her dresses start to arrive off... it will get pretty genuine! Your brain is telling you this isn't suitable, but your internal primal instincts would not stop her as she starts to stroke your tough cock. Before you decide to understand it, she opens her mouth, and you are feeling her tongue about your tip... then her legs spread as she guides your throbbing meat into her swollen moist vagina. It’s all taking place so rapidly; you’re pounding her as she moans!! Your balls swell up with more info cum, and you simply listen to your action-sis say...cum inside of me! Does one pull out or drain your fertile nut deep within her?