Caught my husband

tldr: caught my husband recording a girl who was changing in her apartment opposite to our building. What should I do now?

I F31, found a video in my husbands M31 recently deleted folder. I’m not stupid to ask anyone what this means as even a blind individual can tell he’s recording the girl. I have never suspected him in my entire life and could not for the life of me expect this from him. I was in the folder to retrieve a picture I had just accidentally deleted when I saw this.

He insists he was capturing the flowers and didn’t even know there was a girl(the kind of man he is he couldn’t give two shits about even flowers of gold- his camera was following her). I know men make things up when they’re caught and test the intelligence of their partner but I never thought I’d experience this myself.

I was 5 weeks postpartum when he made this video.

Infidelity of any kind has been a very hard line between us and we’ve been together for 15 years.

What should I do now?

I’ve worked really hard in life and been 100% sincere and faithful and have always supported him. This has completely shattered everything for me.

It might not seem something very big to some but the relationship I share or I thought I did, never had any space for such stuff.

What should be my action from here? My husband is not accepting what he did which is making things worse for me.