My Personal Trainer

I've been married for almost 20 years now, have a newly 18 year old daughter and for the most part everything is good relationship wise. But this has been a glaring issue from day 1, my husband has mirco-penis. Fully erect is 3 inches and while I know this isn't his fault it's still a issue in bed. Now he's very responsible, wealthy and caring but as a lover he just isn't there. I often joke with my friends I should go into acting because of how often I fake my orgasms. Another issue is his job, he's a pilot so while he brings in good money he's often not home days on end and this is where it really starts.

So once a week, I have a personal trainer that comes by the house and for the most part it is basic exercises and a bit of light boxing. 3 years ago, I was working out with him and while stretching I just happen to look at his waist and there was just a very obvious bulge in his pants. I glance away just to make sure it wasn't just how the pants wrinkled but it wasn't. The whole hour I would often glance and it was increasingly distracting. During my cool down I couldn't help myself... He was pushing on my back, streching me towards his body and I just grab his cock and started rubbing it. Obviously he was taken back by me doing this so I explained how starved I was for a good dick and he understood. So one thing led to another and well... it was the best sex I ever had.

That was my first time cheating on him and shortly after that, it was the first of many guys. I know I'm awful for doing this but even I have needs. I just don't know how to explain this to him.