Does one pull out or drain your fertile nut deep

Ok...so you couldn't resist the urge to check out your move-sis naked. It commences off as playful sexual stress, but then as her garments start to occur off... it gets incredibly genuine! Your brain is telling you this is not proper, but your interior primal instincts will never quit her as she here starts to stroke your hard cock. Before you know it, she opens her mouth, and you feel her tongue all around your tip... then her legs distribute as she guides your throbbing meat into her swollen soaked vagina. It’s all going on so fast; you’re pounding her as she moans!! Your balls swell up with cum, and you also listen to your move-sis say...cum within me! Would you pull out or drain your fertile nut deep inside her?