You can tell by the look on the woman's face that she's not buying your dream explanation, but she doesn't have the chance to argue. Before she can protest, you're talking about using dream magic on her. She looks at you with suspicion.

"I don't know about..." she begins, but your confundus charm hits her before she can finish that sentence. She starts to relax, and her expression goes blank.

"I'm sorry. What were we just talking about?" she says. "I seem to be having a mental block..." Your spell has worked! In her current state, she may let you walk her out of here.