Would you pull out or drain your fertile nut deep

Okay...so You could not resist the urge to check out your phase-sis bare. It starts off as playful sexual pressure, but then as her garments start to occur off... it receives really serious! Your brain is telling you this isn't appropriate, but your interior primal instincts is not going to prevent 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 soaked vagina. It’s all going on so quick; you’re pounding her as she moans!! Your balls swell up with cum, so you hear your phase-sis say...cum within me! Would you pull out more info or drain your fertile nut deep within her?