Snapchat

So my husband left his phone at home the other day. I went to answer, because I thought he was calling to look for it. I missed the call & noticed a Snapchat notification in the process. It was a notification that some chick had added to her story. I've never heard of this chick & she has sexual/flirtatious emojis by her name. I opened the app & saw that there has been no interaction even though they've been friends on there for over a week. I honestly was thinking it might be one of those porn account. Unfortunately, her story showed a normal girl. I try not to be one of those obsessive girls, but it just seems odd to me. He doesn't have anyone with her name on any other social media, so it seems suspicious that he's got her on Snapchat with how secretive the app is. I want to ask him about it, since I didn't find it intentionally, but I'm also worried that he will get mad at me for looking into it and questioning him. I just want the reassurance, though.