Do you 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 dresses start to arrive off... it will get very actual! Your Mind is telling you this is not right, but your inner 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 tongue all over your idea... then her legs distribute as she guides your throbbing sex stuff meat into her swollen wet vagina. It’s all happening so quickly; you’re pounding her as she moans!! Your balls swell up with cum, therefore you listen to your move-sis say...cum inside of me! Does one pull out or drain your fertile nut deep inside her?