that my daughter was conned into 'sick' child sitting?

Thank you HidaW. No ,I am not cross with J at all..but very angry with her neighbour.
Her neighbour has even let herself into their house before now to ''borrow'' something or use J's washing machine before they even get up !!!!!
She just shouts upstairs ''it's only me'' !!
There are times that J needs her neighbour to help her out (picking kids up from school etc) and I think 'give and take' is good...but sometimes L takes it too seriously !!!!!!
It is hard to tell J to say 'No' when she knows I am exactly the same !!!!

That was very inconsiderate of your Daughters neighbour to put her and the children at risk of catching the bug, you deserve a rant, I would too.

Oh dear Grumpyoldwoman, rant away it does help. Your daughter was very much put upon and needs to learn to say no with a smile on her face. Whilst there are lovely people like her about there will always be thoughtless so and sos who will take advantage. To be quite honest she was put at risk given her condition. Dont be too cross with you daughter though, otherwise she wont let you know if something like this happens again...just try to give her the confidence to say no to so called friends.