Does one pull out or drain your fertile nut deep

Okay...so you couldn't resist the urge to discover your stage-sis bare. It starts off as playful sexual stress, but then as her dresses start to arrive off... it will get very actual! Your Mind is telling you this is not right, but your inner primal instincts won't cease her as she begins to stroke your tricky cock. Before you realize it, she opens her mouth, and you're 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 speedy; you’re adult video on demand pounding her as she moans!! Your balls swell up with cum, and you listen to your stage-sis say...cum within me! Do you pull out or drain your fertile nut deep within her?