He downloaded tinder?!?!!??!?!

So me and my man have been together for quite a while. We met through his step brother, not through tinder. Anyways when we got together we both had tinder but hadn't been on any dates with anybody yet. Anyways, once we actually got together I immediately deleted my account. He didn't, he claimed he still liked to see what girls swiped right on him. Which just a lil bit bothered me but not to the point I was thinking about it all the time, more of "What loyal guy keeps his tinder up when hes in a relationship?" and that's about it. I didnt even think about it after 5 minutes. Anyways well he'd do it periodically, then when we got pregnant things changed and he deleted the app, NOT his account, just the app. I thought he was done with it, made me feel better, but once we had a miscarriage and I couldn't bare the thought of having sex at the moment he recently redownloaded the app and uses it frequently...idk what to do...