I've been CM for years and feel a bit strange asking for advice on this, which is really a silly wee problem. I mind an almost 2 year old (child A), along with 2 brothers aged 1 and almost 3. On the days i don't have the boys, i often have child A's sister, who is almost 4. The problem i have is that child a is a very aggressive child if she doesn't get her own way, i posted on here before about her constantly scratching one of the boys i mind. Anyway, when her sister is here, whichever toy the sister is playing with, she takes it from her, with force i.e she will hit the sister till she gets it. The ohter day she whacked her sister over the head with a megasketcher, cos she wanted it. When she does this, i always make child A give the toy back, and then give her time out on the naughty step for hitting and grabbing toys.
Yesterday, after several hitting and grabbing sessions, the sister was playing quite happily with the mega sketcher, when child A took it from her, scratching her sister in the process. I took it from child A and gave it back, and put child A on the naughty step. At this moment the mother arrived to pick them. I explained what had happened, and she went into the living room with child A.
Then she said to the sister
"A is just little and you know that she just cries if she doesn't get what she wants. You are older and should know better. Its your own fault she hit you, you should just give her the toy, that way she doesn't hit you, and she doesn't cry and get sat on the naughty step. Please give her the megasketcher"
I was so shocked, i never said anything, but today the same thing has happened, and child A said to me "mummy says i can have whatever i want from sister" As i said she isn't quite 2 yet
Should i say to the mum that it's my house and therfore my rules should be followed, or do i , as my CM friend suggested, let it go, as the child stops being my responsiblity when their mother gets here? I've never really had this sort of problem before, at least not this degree