“Caught Between Loyalty and Heartbreak: My Marriage Crisis” Dealing with betrayal and family pressure—need advice.

I’m on the verge of losing my mind. I’m 43 years old and have been married for 14 years with 3 kids. The past five years of this marriage have been a living hell. First, I found out about a child I never knew existed until after 10 years of marriage, and then the cheating started. It’s been a nightmare ever since. I don’t even know how I’ve managed to cope up to this point. I want to leave, but I don’t know how because of my kids. I’m a product of a broken home, and I don’t want that for my children. His family members are amazing—any daughter-in-law would be lucky to have them. They’ve been fully supportive, especially his mom and older sister. They’re the main reason he hasn’t married his side chick yet, as they keep telling him they won’t accept another woman from him as a wife. But I’m seriously exhausted; I need to leave for my own sanity. Yet, people keep telling me that as long as he takes care of the household, I should just ignore his behavior. How can I when he takes out his anger on me every time he has a fight with his side chick? I’m just so tired of it all. I feel a bit relieved now after getting that off my chest.