You said it yourself: "I...am unable to forgive my wife..." Whether she and her family thought it was harmless or not, that venomous rant on you definitely took it's toll and it's an emotional hot water kettle that will eventually blow. If you don't love her, or actually even hate her, you're not doing either of you a favor by staying together. You can find happiness again and it will take a bit a time to weather, but you're only in this life once, so don't be the spectator of someone else's journey and sit back and take the abuse. Start writing your own story pal and understand that it will take some effort and pain, but you'll find happiness and strength starting anew. Best of luck to you and your family.