So, I have been with my DP for over a year, we have a good relationship, we can be honest with each other and take on board what each other says, or we can completely disagree with each other and all is good.....Apart from when we talk about his kids. He has 2 kids, 6 and 10, 50/50 contact and his oldest completely dominates the day, to the point where it puts me off wanting to spend time with them, it can be anything, if we go left he will want to go right, , if we all want Mcdonalds for tea he will want a KFC, We will still have a McDonalds, but he will bitch and moan the whole time we are in there and he will take forever chosen what he wants, then pick something he knows he wont be allowed, which will then cause a row. Today, for example, we all went out in the car (I have a DS too) so that would be 3 kids in the back of the car, he moaned because he didn't want to sit in the middle, so DP asked his youngest to swap with him because he "couldn't do with hassle" then when the time came to get out the car, eldest wouldn't get out to let the others out (DP had parked next to a post so couldn't open other door) and made everyone wait till he was ready,We then went into Curry's, (Which he constantly moaned about because he didn't want to be in there,) then when it was time to leave he stood looking at the TV's like it was the first time he saw them, he kept saying "wait...wait, this TV is amazing" DP asked him to get a move on and we went outside with my DS and DP youngest, he was ages, like at least another 10 minutes, the whole time DP kept telling him to get out, The more DP told him to move the longer he was, its almost like he enjoys being awkward,In the end DP went back in and pulled him out, which caused a scene, Eldest then moaned about how he isn't allowed to do anything and DP embarrassed him by making a scene ( I was embarrassed) and that if he wants to look at something he should be allowed to! He and DP are always moaning at each other, and the other always has to get the last word in and it is doing my head in. It can literally be anything, whatever we do, he will always want to do the opposite, The bickering and constant moaning about whatever we do is really starting to put doubts in my mind about the relationship. AIBU to ask for advice on how to broach this?