Does one pull out or drain your fertile nut deep

Okay...so You could not resist the urge to check out your phase-sis naked. It starts off off as playful sexual tension, but then as her apparel begin to arrive off... it will get pretty actual! Your brain is telling you this is not right, but your inner primal instincts will never quit her as she starts to stroke your really hard cock. Before you comprehend it, she opens her mouth, and you feel her tongue all over your idea... then her legs distribute as she guides your throbbing meat into her swollen soaked vagina. It’s all happening so quickly; you’re here pounding her as she moans!! Your balls swell up with cum, therefore you listen to your action-sis say...cum inside of me! Does one pull out or drain your fertile nut deep inside her?