Do you pull out or drain your fertile nut deep

Alright...so you couldn't resist the urge to view your move-sis naked. It starts off as playful sexual tension, but then as her clothing start to arrive off... it gets quite authentic! Your brain is telling you this is not ideal, but your interior primal instincts will not likely cease her as she starts to stroke your hard cock. Prior to deciding more info to understand it, she opens her mouth, and you're feeling her tongue about your idea... then her legs unfold as she guides your throbbing meat into her swollen moist vagina. It’s all happening so speedy; you’re pounding her as she moans!! Your balls swell up with cum, and you hear your action-sis say...cum inside me! Would you pull out or drain your fertile nut deep inside her?