Does one pull out or drain your fertile nut deep

Okay...so You could not resist the urge to see your phase-sis bare. It starts off off as playful sexual rigidity, but then as her garments start to occur off... it receives pretty serious! Your Mind is telling you this isn't correct, but your internal primal instincts is not going to end her as she starts to stroke adult video your tough cock. Before you comprehend it, she opens her mouth, and you are feeling her tongue all around your tip... then her legs distribute as she guides your throbbing meat into her swollen moist vagina. It’s all happening so fast; you’re pounding her as she moans!! Your balls swell up with cum, so you listen to your stage-sis say...cum inside me! Would you pull out or drain your fertile nut deep inside her?