I pick up a friend's DD from school (in Reception)and she comes back to play with my DD (Y1). She also comes for a sleepover sometimes. I have seen her weekly since she was 2. Although has always been reserved to me and DH she used to look at us and speak to us occasionally. Since about a year ago (she's now 4.9)she started by refusing to kiss me goodbye (i was fine with this) which has slowly transformed into almost always refusing to look at me, respond to me in anyway and now she has started to talk to me in a rude way e.g demanding a drink in a rude tone. When I or DH pick her up from school she refuses to look at us, will not answer any greeting/question or responds in an unfriendly way e.g shall I hold your bag? is answered with a abrupt NO! Although she is a reserved child she mixes very well and I am sure she is not angry about her parents not picking her up. In fact she gets annoyed if she can't come to our house.
We pick her up because her parents can't and we like them and want to continue doing so because our DD is an only and really enjoys playing with her. However, tbh we are really starting to dislike her. She is still in the first term of Reception and I know DD got a bit of an attitude in term 1 too, however, this started before she started school.
She adores our DD and copies every noise move etc that DD makes (that is quite irritating too tbh)
Is this just a phase, is she just a reserved child or is she just plain rude and annoying? I am leaning to the last atm and am on verge of talking to parents but I don't want them to feel bad as they already feel a bit bad about us picking her up (even tho I tell them it's ok) and DD would be upset if she stopped coming to oour house.