I don't like Rhona one bit (I dislike Vanessa even more) and I think her behaviour has been terrible.
But at the same time Paddy is kind of proving her theory right about why she didn't tell him about her addiction in the first place. She thought he'd leave her and hey presto he has. I can understand it must be hard to deal with an addict, the lies and deceit, mood swings etc, but at the same time I don't think he fully appreciates how hard it is for someone to kick an addiction. It doesn't happen overnight does it?
I think he was kidding himself about how hard it would be to cope with. I know he said he's tried, but he hadn't tried for very long has he?
On the other hand I can't stand Rhona anyway so don't really care what happens to her lol