Would you pull out or drain your fertile nut deep

Ok...so You could not resist the urge to discover your stage-sis bare. It starts off off as playful sexual tension, but then as her apparel begin to come off... it gets quite serious! Your brain is telling you this isn't appropriate, but your inside primal instincts will not end her as she begins to stroke your hard cock. Before you realize it, she opens her mouth, and you're feeling her tongue all over your idea... then her legs distribute as she guides your throbbing meat into her swollen soaked vagina. It’s all going on so fast; here you’re pounding her as she moans!! Your balls swell up with cum, and you also hear your phase-sis say...cum within me! Do you pull out or drain your fertile nut deep inside of her?