If hubby is going to be a part of this family then his cock will have to be under the sisters contol! All cocks are trained in this family. The Women wear the pants in this household. Sister mika instructs her sister on making his cock conform to their expectations. He will have to get hard and not cum. While She sharpens her knife, threatening his dick if it does not obey. Sperm should be kept inside those balls. You can only keep them if you can control them.