Would you pull out or drain your fertile nut deep

Okay...so you couldn't resist the urge to view your stage-sis naked. It starts off off as playful sexual stress, but then as her dresses start to arrive off... it will get pretty actual! Your brain is telling you this is not ideal, but your internal primal instincts won't cease her as she starts to stroke your tricky cock. Before you realize it, she opens her mouth, and you're feeling her here 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 quick; you’re pounding her as she moans!! Your balls swell up with cum, so you listen to your action-sis say...cum within me! Would you pull out or drain your fertile nut deep within her?