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 off as playful sexual stress, but then as her dresses start to arrive off... it will get pretty actual! Your Mind is telling you this is not ideal, but your inner primal instincts would not stop her as she starts to stroke your challenging cock. Prior to deciding to know it, she opens her mouth, and you feel her tongue close to your suggestion... then her legs unfold as she guides your throbbing meat into her swollen damp vagina. It’s all going on so fast; you’re pounding her as she moans!! here Your balls swell up with cum, and you also hear your phase-sis say...cum within me! Would you pull out or drain your fertile nut deep within her?