Hubby and I are married 4 years. Together over 13. Apologies if spelling is bad - on phone and screen is smashed. Where do I start?

We arnt getting on. Haven't been for most of the marriage if imhonest. We've 2 children aged 2 and half and 6 months. He is a ard worker and good father but shot husband. Recently - well a year and half ago we found out his dad abused his aunt - exposed himself to her and masturbated in front of her. Our first daughter was 1 at the time when we found out. I'm so angry that his mum didn't tell and instead allowed my daughter to be alone withhim. I constantly bring this up when we fight. At the minute our fighting has been going on since /0th June - everyday we are getting nastier to each other. His mum was here earlier - he has told her everything and turns out he has also told a friend about our problems. Sobr know what advice I want but want to get it off my chest. Feel so unhappy and sad right now and could write slot more. :(