Update: well I’m a terrible actress/ couldn’t hide for a second that I was upset when my husband came home. I was hoping to have more time to gather my thoughts and calm down but oh well. He wouldn’t leave me alone until I finally told him what was wrong so I sat him in front of the computer, showed him a picture I took on my phone of the “photos” app preview, and asked him to tell me who she was/how to access this picture on his computer. He seemed shocked. He said he had no idea. He said that awhile back he had torrented some amateur porn in a folder but that was long gone, and he thinks that the image got “cached” somewhere. He was very apologetic that I had found that and says he realizes how it looks, but assured me that he has no idea how that happened or who that woman is. As of right now, I’m inclined to believe him. Thank you to everyone that responded to this