I need advice

She needs to adjust. It's a disruption and she just needs to settle in. She feels jealous of the 3 year old. Just give her time and lots of extra attention. Also, let her do things like help crack the eggs and set the table. Tell her that her cousin can't do these things yet because she's just a baby. Only big girls can help like this. Lots of praise will help. Good luck.

if she is seeing the 3 year old have bad manners she will pick some up, you jut have to remind her that the cousin hasnt learned not to do these things and it would be great if SHE would help by using her good manners


the baby reverting, sometimes happens even when you dont have younger child araound. Do big girl stuf with her and talk about how fun it is to be big enough to do them

Depends what you mean by the "baby" stuff she is "out of" and what you mean when you say shes is acting like a baby.

She's acting out due to the stress of her new environment. Give her more attention & patience and she'll snap out of it.

Crafty26 wrote: Depends what you mean by the "baby" stuff she is "out of" and what you mean when you say shes is acting like a baby.

I agree. It really depends.

The more relaxed & accepting you can be of stress-induced behaviors (like extra "demandingness," reverting, needing more help with things) the less you'll actually be reinforcing them! The more you can take these things in stride (rather than pushing against your daughter because you're stressed or fearful that she will "go backward" & then you'll all be "stuck") the more you will be meeting her need & increasing the likelihood that she'll get whatever reassurance she needs to return to her usual level of functioning & behavior.
Basically, this moment is at is is (whatever it is!) If you can bring acceptance to it, even if it's not the moment you would choose if you had that power, then you can be moving FORWARD rather than stuck engaged in a power struggle.

She's dealing with change, not necessarily the influence of the 3 year old.