IIRC, he cheated on his wife with his cousin. I don't have web reference. I went to an Einstein exhibit (at the OMSI) that had a bunch of hand-written letters and such by him (in addition to attempting to make his theories more accessible). Though 'cheated' might be a little relative. I think that he may have just been spending a lot of time with her and writing her love-letters rather than just sleeping with her.
Here are some quick links I turned up on the exhibit:
The Flickr link has a bunch of photos of the documents, but I don't none of them are labelled, so it may be a bit time-consuming to search for anything specific.
You'll need sufficient proof for that. Not just "heard".
Looks like he was a demanding jerk as well.
Really? Asking for 3 meals a day and laundry? Maybe he's the one responsible for paying all the bills. Don't read half the story.
Also, I think their relationship is broken already, they were just keeping an "MVP" for the children.
You will undertake not to belittle me in front of our children, either through words or behavior.
That could also tell that the wife is not that innocent too.