Plot holes (spoilers) the size of...Montana? Alaska???
1. Why was Clive not surprised that Jennifer didn't look very beat up when the multiple rapes were over?
2. Are we to believe that Jennifer trolls the commuter trains looking for frustrated, horny married men with $100K that they can spare? And just because she's beautiful, we're also supposed to believe that she can she find them every month or two!?!
3. How did Clive get into the prison with a weapon...presumably on multiple days?
4. Why is the blackmail money being kept in the sleazy hotel safe? Wouldn't they have stashed it in some offshore bank account...or at the least, a safety deposit box?
5. What downtown hotel Chicago hotel -- not blatantly overrun with rats, pimps and crackheads -- only charges $46 a night? (The worst thing about this hotel room appeared to be the tacky lamps and bedspread.)
6. And why are audiences always expected to believe that an otherwise intelligent man would pay blackmail in the vain hope that THIS payment will be the LAST?
The plot twist(s), however twisty, didn't work for me because of all of these factors (and more).