What would you think and how would you feel?

I was going through my husband's email and I found a bunch of dating sites emailing him and girls saying they wanna suck him and so on. Not sure of what to think because I found something similar on his tablet a few months back and asked him and he said that it was his sister that done it. I could believe that one cause she's like that but this time his sister ain't had his phone. I'm emotional right now about the whole thing and all I ever get to do is sit at home and take care of our little one and I only get to leave the house maybe once a week. What would y'all do and how would y'all react to this kind of thing of y'all found it on your husband's phone?