M.S.
Wow. I am wondering how you think you are going to handle working full time, getting your MBA, and caring for your children. You will definitely end up divorced because there will be zero time to work on your marriage! I am a SAHM who is in grad school and let me tell you the demands of grad school, kids and marriage are enormous. Do you understand the amount of time it is going to take to get your MBA?
I'm sure your children would appreciate their mom staying at home, working on her marriage and getting her MBA. Your marriage is worth preserving unless he is abusive or unfaithful. You fell in love with this man and married him for a reason.
Go to school online. It will be easier on you and your family.
Good luck!