My Son In Law

I have an obsession with one of my son in laws. I don't feel like it is out of control or anything like that, but I had an experience lately that started my feelings of attraction for him all over again. I live on the East Coast, as well as two of my other daughters. We all live near to the town that they grew up in. Both of my close by daughters married men, who they had known since high school days. One of my daughters however, lives on the west coast, and has been out there since college, and married a man she met in college out there, who was from that area. I bring this up because I've never been able to figure it out, but her husband is so different than my other two son in laws. Where they are dark haired Italian and stocky, my Westcoast son in law is blonde, tan and thin. It may just be that he is so much their opposite, that I have always found him especially attractive.
Last week I happened to be out there for a few days visiting, and the first morning while hanging up a blouse in the guestroom closet, I accidently knocked one of my daughter's old carryon travel bags off of a shelf. It landed on its side on the floor. I reached down to pick it up and an open white envelope fell out on the floor, containing xrated pictures of my daughter and my son in law nude and engaged in sex. I was really curious and only saw a couple of pictures from the stack, but there looked to be around 20 of them, and one that I saw was my daughters hand stroking my son in laws erect penis. My heart was thudding in my chest, and I resisted all urges to look at any of them, so I put them back in the zippered pocket and put the bag back onto the shelf.
For the rest of the day, as they took me around sightseeing and out to dinner, all I could imagine was my son in laws engorged penis from the picture! As hard as I tried, I couldn't get it out of my mind! I even found myself accidently brushing against him and engaging him in conversation every chance I could, I felt an uncontrollable urge to be close to him, It also doesn't help that he is extremely sweet and has always treated my daughter and me so nicely, which I have always found extremely attractive.
After a day spent with him and my daughter, I could barely make it back to my room to turn in for the night, when actually I had really planned on looking through the pictures in depth. I saw a note scribbled on the back of a couple pictures to my daughter, to "take these on her next business trip to look at when she missed him". Some pictures were pretty standard, him nude in the shower, taken likely by my daughter, others of his small untanned butt, and a few of him inside my daughter on her back with his full balls pressed against her. I was getting really turned on as I looked deeper in the stack, there were more of him buried in my daughter's vagina, some of him pulled out and ejaculating on her lower stomach, and a few of him cumming on her erect nipples. Some of the pictures were a little blurry so they were obviously taken by them and not someone else taking pics for them. One picture in particular made me so aroused that I had to masturbate to it. It was a picture of my daughter's hand firmly wrapped around his really hard veins swollen looking shaft just below his dark purple hard shiny swollen head. What really turned me on was there was a huge drip of precum on the opening of his head. You could tell he was straining and holding back his semen. I was about to orgasm looking at it, and as I sifted through the pics, out of order a couple pics later, was the same pose but with his semen spraying out caught mid ejaculation. I couldn't hold my orgasm back and came looking at that image.
Now I know this is a confessions site and I do have a confession. Beside the fact that I fantasize about my son in law and now have a concrete image seared into my mind, I also must confess that I took that picture of his hard erection spraying cum to look at when I need a release. I feel terrible about this but I just couldn't control myself.