Does one pull out or drain your fertile nut deep

Alright...so You could not resist the urge to check out your phase-sis bare. It starts off as playful sexual stress, but then as her clothes start to arrive off... it receives very actual! Your Mind 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 know it, she opens her mouth, and you're feeling her tongue all over your idea... then her legs distribute as she guides your throbbing meat into her read more 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 listen to your action-sis say...cum within me! Would you pull out or drain your fertile nut deep within her?