Thanks everyone.

So I told them that they can give her water if they want but not juice (since I gave her some water just to see if she really was thirsty and she just played with the bottle, so I knew she wouldn't drink it) and they said that was fine, agreed it would be better etc. So my mum took her for 1/2 hour or so this morning so I could sleep a bit longer and when she brings her back into me, "I just put a little juice in water?" WHAAAT? BUT I SAID NOT TO WTF?!??!?!?! Grrr! They AGREED with me, so why did they do it?! AND they gave her banana again!

Tonight, she wants to sit down and have a "talk" (yay) so I figure that's the perfect opportunity to explain to them that they must stop this. TBH I feel like i've opened a pandoras box by giving her rice cereal in the first place, I wish i'd waited another month or so.