Accidentally Catching Wife Masturbating

I knew she had too, we all do. She would never admit to it even after being married for 20 years. I had to beg her to touch herself in front of me while we were having sex. It all was by accident, we owned a triplex and were living in one unit while
converting the other two into a bigger house for us. I was in the attic moving some things around and I heard the bathroom fan come on. This was an older place and the fan just vented straight to the attic without a pipe and the little doors would open when fan was on. Wasn’t long and I hear the bath water running. I thought I wonder if I can see anything. I crept closer to the fan and was able to lay down where I had a full view of the bathroom. Feeling the adrenaline rush from knowing I shouldn’t but also because I can see her naked there. I’m watching her standing in front of the mirror removing her makeup, breast gently swaying. If I’m not mistaken her nipples are a little pointy. I reposition myself and go for a better look, I can’t see her. I move some and there in the corner she stands with her hand between her legs. I about faint. I watch in amazement as she then props a leg upon the toilet for better access. As her hand continues she brings her other hand up to caress her perfect tits. I am rubbing myself through my jeans by now as she starts to tremble I know she is cumming. I do as well. Later that night we did have sex and all I could imagine was seeing her alone. That was the first of many times.