I work in a nursery, I am not a qualified member of staff. I am lunch cover, I have a 2 yr old and 4 yr old so working part time. A member of staff is making my days hard at the moment, I don't know if I am over reacting or not so I am posting on here. She is constantly having something to say to me, I will be interacting with the children, and she will say 'oh, they're doing this over there, you need to stop them' and I then have to go and deal with it, even though she is sat not doing anything. She has seen it happen but she is telling me to deal with everything. A little boy wanted to sit on my lap whilst we were waiting for snack and she said ''you need to grab him, (another little boy who has SEN) not him.'' But the little boy wanted to sit down so I wasn't going to stop him. Again, she was sat not doing everything. Hopefully this makes sense but she is basically making comments all the time and putting everything onto to me. This is only two examples of it but it's all the time and it's affecting my confidence. I also keep getting left by myself when I am not meant to be because I am not qualified, and I also have no SEN training and this member of staff keeps saying I need to shadow the non verbal SEN children on a one to one which I am finding difficult as it is not something I have experience with. How would you deal with this?