<human>: I have been with my husband for almost 9 years (married for 4). Started dating when I was 16 and he was 18 so we had the whole high school sweethearts thing and got married when I was 21 and he was 23. A bit young perhaps...

Here is the problem. We have been separated now for about 5 months because we have been having issues. I realize though that there is one major thing that is preventing me from trying as hard as I should to make it work. I caught him looking at what appeared to be child porn (girls looked about 12 years old) twice. This was by looking at the history on the computer, and he said he really didn't know it was going to be like that when he clicked on it, but based on the picture he clicked on I have a hard time believing it. I know he would never hurt a child and 99.9% of me knows that he probably wasn't trying to look at that kind of thing. But once you think that once, I don't think it ever really leaves your head. If there is a chance that I will continue to have that doubt in the back of my mind, I don't think I could have children with him. It wouldn't be fair to either of us.

I told him this was the reason and it all but destroyed him to know that I could think that about him, and I feel terrible, but I don't know what to do.
Other than this I think our relationship issues are solvable, so I'm just really confused about what to do next.

So

Can you condense the text into three sentences or less?
<bot>: I might have caught my husband looking at child porn (maybe) and I can't get it out of my head.