While I believe the poor woman is scared shitless because of the other idiot's threats, Leslie is now part of the Salvatore, so unless she's been living in a hole it makes no sense that she'd follow that man's orders. Then again, it's very likely her daughter was kidnapped and used as a hostage so she does their bidding. This, however, doesn't explain why she didn't provide any clues as to her situation. Still, we're talking about a commoner in a world set in the middle ages, even if she worked as a maid, they usually didn't receive any education so it could explain the brainless reaction to the whole situation.
Leslie as well, it's hard to believe she'd trust someone simply because of some jam, even if it was the only person to give her any back then. She should know better about that idiot making use of any means to hurt her.
It's a weak development to say the least.