What I posted in the other thread...
I'm scared that it's going to be Denise 
- Abi and Max have been covered in tonight's/last night's episode
- the Beale's in tonight's episode
- Phil seems to think it's Ben although we don't know why
- I'm convinced Whitney and Lee will have their moment of skepticism in tomorrow's episode, but neither have probably done it (like an Abi/Max moment)
- The Crokers & Jay can definitely be ruled out because they're not even important enough to be in the lives
- same with Lauren but under different circumstances, and she's been ruled out for a while anyway
...just leaves Denise 