I didn't tell my mom at first. 1) I didn't want to burden her, she's very loving and caring and my parents have been like parents to my WH since day one (foo issues w/him). Also, divorce was pretty much non existent on that side of my family until my brother D a few years ago (not infidelity related) and it broke her heart. My parents have been married over 45 years, my grandparents were married 70 years, aunts and uncles all still married. I really am inexperienced when it comes to divorce and marital problems. 2) I was also worried about my WH relationship with my parents if we divorce. However, I needn't have worried--I told my mom about a year and some change after first Dday, when I had another Dday. She sat and listened and cried and said, "so what do you want to do? I will support anything you do. And I will not cause a scene, or any trouble." She basically told me if I wanted her to hate him, she would. And if I wanted her to forgive him, she would. She would do whatever I needed her to do to help ME. It was the best thing I did, telling her. We are close, she lives nearby, and if I have a bad day or a fight with WH I can just go over there and talk, get a hug, whatever, just be. These past few months have been difficult, my marriage has taken a turn for the worse, I've been back and forth so many times about what to do, and she has been my rock. Also, she stops by often to make sure I'm taking care of myself, helps with my daughter, tries to get me out of the house. I just couldn't imagine where I would be emotionally if I had continued to keep this a secret from her. plus, if we get D, my parents will continue to be civil with him for the kids. They are still in contact with my brothers XW (my bro is fine with this) for the kids. They go there for bday parties, etc.
wow, after typing that all out, I am crying. I really do have great parents, I am lucky. Maybe I need to spend more time focusing on the blessings I have in my life instead of all that's gone wrong.
Melamber, I don't know what to do about your mil. I don't really have a mil. WH is estranged from is bio mom, has a step mom that he's kinda close too. He really only even has a relationship with his dad because of his step mom. He told her near the beginning, he called her himself (they live in another state). This was when he wanted R and was desperate and called her for advice. Although I found out later the A hadn't stopped then either. I don't know what he's told her since. I don't think she would ever shun me, but I don't feel it's my place to talk to her about it. We just aren't that close.
Anyway, I would encourage you to talk to your mom. My wanting to "protect" my mom was misplaced. Our parents are supposed to be there for us, to help and guide and comfort us. I would do the same for my kids.... Besides, it's just to heavy a burden to carry on your own. Good luck, and hugs....