Letting A Old Man Watch Me Rub Myself

I was 16 and he was about 70 years old. He was very wrinkled and kinda fat . He was sitting on a bench inside of a home improvement store that was next to the bathroom. I walked past him and smiled because I always look at older men package to see if they have a hard on. As I go in the bathroom I noticed he watched me walk away and he started rubbing his crotch area. I immediately got wet and knew I had to go rub one out of my pussy. So I got the closet bathroom stall to the door and dropped my already wet panties and started flickering my clit whimpering and saying hurry up and get in here don't let anyone see you. After a few attempts he didn't hear obviously. So I pulled my fingers out of my pussy and walked out to him and told him that he was more than welcome to come help me out. He said I'm waiting for my son to get done with his shopping but it'll take a while since we just got here. I ran back in the bathroom and assumed the position of panties down swollen lips open fingers in. The old man walked in and shut the stall door behind him . He said honey how old are you. I told him and said my pussy is aching and it doesn't matter how old I am .. I was already creamy by then . He said so what can I do ? I told him to just watch me and jerk off over his pants for a few. So we both began our mutual masturbation together, then I got really excited and asked to see his old cock . He pulls it out and lays it in my knee it was so wet from precum and piss because he got excited fast .. I then started rubbing it all over my leg letting the precum and piss run down to my tight pussy... He began to bounce a little bit saying I need you to call me grandad and tell me what you want me to do to you baby.. so I said grandad please taste me and stuck your tongue inside me. I stood up on the toilet opened my legs and hole for him to tongue fuck.. he jacked off while doing it... We both exploded fast and hard. I got down and cleaned up the cum and piss of his fat cock . He gave me his address and said come over tonight and let's roleplay some more. This time it's going inside your pussy and asshole baby.. btw I spent the weekend with him and now I'm 21 and still here eating his cum daily... My pussy only aches for him