My father is cheating on my mom and I have solid proof

I'm 20, 3rd year law student, not a first gen civil property mf in future but i wanna be a criminal lawyer so bad I found out my dad is cheating, he cheated when o was a kid, mom and dad have been married since 21 years now, I always knew that he was cheating , i just found out chats and everything Like hahha at this point i have no faith in love Coming back to the point, I don't think i should tell mom cuz the thing she suffered already, and her health issues I grew up in this dilemma that i need to hate my dad or do i need to love him and i felt i have no idol to look up to all my life, Now in recent years when I thought he fixed himself now i found him doing all that.We aren't very rich but we get it work easily, but i still try my best to not to make it hard for my dad for money and other things, but now i feel like idc i should just ask for money shamelessly because i deserve it at the end of the day i always wanted to be a criminal lawyer because i wanted to put "respect" to our name but lol, now i feel like why struggle for 5ywats after passing out, i should aim for corporate law firms. Idk what to do what to feel honestly Whole life i questioned myself that i will be like him or not He had been an amazing father tho like 100% amazing father lets be honest

Now should i just send him the pics I have of him cheating and ask him stop cheating forever and that i will tell not only mom but everyone in the society Or should I give up the "good person" shit and blackmail my beloved dad for money because who cares