The first time he cheated on my mom was with his assistant. Now its some random old hag.

The only thing I see wrong with my mom is her nagging. She does everything frugally and makes sure the house in in order. I cannot comment on my parents sex life as I have no idea. My parents are both 60.

Yesterday, I discovered proof of his cheating while on his new phone. (I was helping install some apps and the message suddenly appeared) He owned up to it and said "stop being so nosy" He later said that he is in a business venture with this other woman and openly said she was his mistress.

It's no wonder my mom was worried about my dad suddenly for closing their joint account and hiding his paycheck which for the past 30+ years my mom was in charge on banking in the cheque.

Now I have the phone number of the other woman, I checked through whatsapp and discovered the picture to be some dark skinned old hag.

What should I do now?

I don't want my mom to find out either because the first time she found out about the 1st woman, she wanted to commit suicide. Mom later forgave dad and did her best.

I calmly said that it's quite normal for men to do what he does given that my dad is rich.

The reasoning for him doing this is because he wants to enjoy his life. I even suggested he go for some hookers instead of gold diggers like this. LOTS of money has been lost to her instead of going back to our family.

I have no idea what to do.

Edit: If you are new to TRP. Please refrain from posting ideas.

Edit 2: Out of the blue, my dad asked me if I needed a loan. Felt like this was bribery to keep quiet. I smiled.