"weak willed" may have negative connotations, but I can't think of a less loaded word that would express the poster's meaning better. "suggestible" comes to mi

"weak willed" may have negative connotations, but I can't think of a less loaded word that would express the poster's meaning better. "suggestible" comes to mind, but I don't think this is really the same thing. And if the poster really believes that the parents are weak willed, I don't think that saying so can be considered as failing to use reason. In fact censoring oneself to use adjectives that carry less negative connotations, is a violation of reason.