you walk in on her moisturizing her pregnancy titties with oil. she needs to keep them moisturized to prevent stretch marks. do you see any stretch marks? i know im your mom and im not attractive to you but pretend im not, do you think my titties are still attractive with my visible blue veins and dark nipples?
she notices you have a boner so asks if you want to help apply more oil. she gives you a quick tit job then says she needs your semen as an extra layer of moisturizer.