Me and my 82 year old mom was going food shopping but she asked would i rub some cream on her sholders first as she had a skin rash , The cream was in her bedroom so i followed her to her room and watched as she removed her dress she stood infront of me in bra,knickers and tights. As i started to rub cream on her she asked if her bra straps were in the way i said yes she removed her bra and i could see her little titties. When i finished i said i need to wash my hands in the bathroom my mom said you need to deal with that and pointed to my hard on. I went in the bathroom and started to wank my hard cock my mom came in just as i was shooting my load .