That is what I was thinking also because he was drawing on his own experience, but then when they showed the flashback of Nina and Curtis having the conversation about Nina sleeping with Drew, that could also be a clue that it was giving Curtis that idea.
It is really starting to get ridiculous that Drew has the upper hand over everybody and continually uses the same information to blackmail everybody. When is that going to end. The more they give in the more he’s going to do it. This is something Curtis has over Drew and I don’t know if he’ll go to Willow or go to Drew. I’m sure Drew‘s first instinct will be that Willow would never believe it, but I guess we shall see.