I (30F) just found my husbands (36M) other phone. What should I do?

I (30F) just found my husbands (36M) other phone.

Just some background. Me and my husband have been together for 10 years, married for 4 with no children.

Last night I went looking for my credit card I misplaced and found another phone. It was locked. I took it to him and at first he tried to deny but then eventually confessed. He would not unlock it and told me what whatever was on it wouldn’t make it any better. He then smashed the phone. He then blamed it on a porn addiction and said he was just flirting and nothing else.

Mind you he did this very early on in our relationship too and said he just wanted attention. Which was another reason he said he did it now.

I’m at a loss of what to do. I mean really I just feel to tired and defeated to deal with this. I lost my mom a little over a year ago and gained custody of my 16 little brother so I have him to think about too.

What should I do?

Edit: he said his reasoning for smashing the phone is because he is ashamed of the porn he looks at. Whatever that means