Nah, I think Bill and Hillary had an arrangement, and it involved:
Hillary not being accepted as a lesbian (at the time she was graduating college it wasn't socially acceptable), probably acting at least as Bi- to cover for it.
Bill was the womanizing charismatic potential meal ticket.
Bill is allowed to bang whatever moves, as long as he can keep it discrete.
Occasionally Hillary spreads for him, hence Chelsea (a good political move to have kids around so nobody wonders about what actually goes on at home).
Bill has a long history of affairs (Lewinski was only the most visible) that both Bill and Hillary work towards keeping covered up, especially as Bill's star is rising in the Dem party future.
Hillary has her own (she's at least smart enough to keep it fairly discrete--however wasn't there a rumor about her an Markie Post on AF1?) affairs occasionally, but is pretty much a sexless beotch (gets her kicks screwing the country instead!).
Lewinski happens--new deal occurs....Hillary says to Bill "I'll play the hurt, loyal wife, but now you have to support my political ambitions".
Hillary (if elected in '08) will declare that she used to be Bi-Sexual (at the very least).
AFARR