@Nichole He’s not with them that long. I would say maybe two hours max and It’s like every two weeks and I have tried to tell my parents do not let him do whatever he wants because when we go back home, we have issues going back to the structure and routine at our house
I have a 3.5 y/o and the same thing happens with her. It always takes me a day or two to get her back on track. You can try making your boundaries for strict. For us we just limit the amount of time she goes over there because she is a spoiled brat when she comes home. Our 1 y/o doesn't leave for long periods of time so luckily I don't have that issue with her yet
How long is he with them at a time? I want to say it's pretty common. I've seen it more in kids that have divorced parents. I see it in my stepson when he gets home from his mom and my brothers did as kids going back and forth as well. Kids have a harder time transitioning when it comes to change of rules or even fun vs structured.