Does one pull out or drain your fertile nut deep

Alright...so you couldn't resist the urge to discover your stage-sis bare. It starts off as playful sexual stress, but then as her clothes start to appear off... it receives extremely true! Your Mind is telling you this is not correct, but your inner primal instincts will not end her as she begins to website stroke your hard cock. Before you realize it, she opens her mouth, and you're feeling her tongue all-around your idea... then her legs spread as she guides your throbbing meat into her swollen wet vagina. It’s all happening so quickly; you’re pounding her as she moans!! Your balls swell up with cum, therefore you listen to your phase-sis say...cum within me! Do you pull out or drain your fertile nut deep inside of her?