Does one pull out or drain your fertile nut deep

Okay...so You could not resist the urge to check out your stage-sis naked. It begins off as playful sexual pressure, but then as her dresses begin to occur off... it receives pretty real! Your Mind is telling you this is not appropriate, but your inside primal instincts will not quit her as she begins to stroke your difficult cock. Before you comprehend it, she opens her mouth, and you are feeling her tongue all over your tip... then her legs distribute as she guides your throbbing meat into her swollen moist vagina. It’s all going on so rapid; you’re pounding her as she moans!! Your here balls swell up with cum, therefore you hear your move-sis say...cum within me! Does one pull out or drain your fertile nut deep inside of her?