I'm Confused

I've been watching the developments in the Terri Schiavo case, and quite frankly, the whole thing is one sad mess. Some doctors say she's in a vegetative state, some say she can be rehabilitated to the point of verbal communication. Some people say she should live no matter what, and some people say she should be allowed to die and have peace. In the middle of this bitter battle are the Schindler's (Terri's parents) and Michael Schiavo, Terri's husband. I don't know all the teensy little details of this case, but the answer to one question would go a long way toward clearing things up for me. It's a question that goes to the husband's motivation for Terri to "exercise her right to die".

If Michael loves and cares so much for Terri, why is he living with and fathering children with another woman?