I love stories- don't you?
My dad cheated. My mom found out when I was a baby and he "promised" he'd never do it again... My mom stayed "for me". When I was 5 years old, he got a woman pregnant and had to pay child support for that girl (my half-sister), he "promised" he'd never do it again... my mom stayed "for me". My parents didn't want to upset me so they never told me about my half sister until I was 10 (and were under a lot of pressure from our family)... When I was 11, while cleaning house I found a stash of my dad's love letters to a "girlfriend" of his... some dated very recently. My mom knew what he'd say- so she just tossed them in the trash.
The next time my parents fought, I went out on the deck to get some air. I was supposed to be in bed, sleeping. My mom walked out on the deck (probably to do the same thing...) and sat next to me...
She was chatting with me and asked me how I felt about things. I told her that I thought they should both just get it over with and get a divorce. She adamantly said that she was staying "for me" and that she didn't want me coming from a "broken home".
They didn't divorce until after I went to college.
I spent my whole childhood LIVING in a broken home- it was just broken on the inside, masquerading as normal on the outside. My dad never stepped up as a parent, and not only was inactive in parenting me- his other daughter barely knows him AT all.... and was forced to basically go completely fatherless her whole childhood to protect "me".
When my mom told me she stayed "for me" it didn't make me feel extra loved or extra special. It made me feel like it was my fault that my parents couldn't go live happy lives apart from one another! I had to go through counseling as an adult for how guilty I felt about my parents' marriage! Would a divorce have been hard on me... sure, no divorce is "easy"... But my parents would have had a chance for happiness... and their fighting, and the cheating, wouldn't have kept me up so many sleepless nights.
I also had a ton of friends whose parents were divorced. Sure, their families were "complicated" and not perfect. But I cannot think of a single kid in the mess that wished that their parents had just stayed together "for them". If two people stay together and can work it out and come back to a place of love and trust- then sure... stay. But if the only thing holding two people together are their children and and "idea"- that will never make ANYONE happy. Co-habitating is NOT being a family.
I love my mom, and dad, dearly. My dad became the grandfather to my daughter that is wonderful and attentive and present in a way he could never be as my father. My mom was a wonderful mom, who taught me love, compassion, independence, and street smarts- and I look up to her greatly. BUT- her biggest mistake as a parent, the one with the most consequences and the most damage done... was staying in that marriage! Finally my mom has a new husband that treats her with love and respect... and she is finally starting to "get" what I wanted her to see when I was 11.
Good Luck to your friend- in all her choices!
-M.