I SEDUCED MY FIL WHAT DO I DO NOW ADVICE NEEDED

my FIL [M87] and I [M53] were caught with each other by great aunt helen [F112]. then the bitch went on to tell my wife [23F] and snitches get stitches so I pushed her off her wheelchair and she fell down the stairs and died. now the bitch wants a divorce? not my fault your dad was enamored by my humps and wanted a slice of my ass. now i need advice on what to do. how do i save the marriage? pls help me!

TL;DR my wife found out I had seggs with her dad and now she wants a divorce just cause i killed her great aunt.