Our ds 7 can be a bit trying at bedtime. DH puts him to bed and he is much worse for him than me. I get him to bed in about 15 mins but do need to be pretty no nonsense. He won't come off his iPad/tv to go upstairs, then delays bedtime, messes around, generally doesn't listen to DH and DH gives up or ends up shouting at him. Every bedtime DH shouts to me to sort it out. It doesn't take much for DH to loose him temper and he doesn't follow through his threats and the kids know this.
ds is very strong willed, we have tried rewards for bedtime in the past which is up and down. Especially if he's just had a reward. Unfortunately we have gone to parenting quite heavily with consequences but even then he doesn't really care that much, loosing the iPad because he doesn't go to bed nicely doesn't bother him that much. He's not that motivated by praise or rewards.
DH has always made bedtime really fun, lots of games, playing with ds, allowing him to draw it out, getting him wound up and then expecting him to just calm down and go to bed when he's told. Over the years I told him if he carried on we would end up in this situation and surprise surprise we have. Now DH shouts me to sort of out and I become the bad guy issuing consequences. DH has said I am to put him to bed for the next few weeks as his consequence for another bad bedtime. But I don't want to, I don't want to be the punishment and don't want to be the bad guy while meanwhile DH is fun daddy.
DH says he can't cope with them and his stressful job and gets upset that they don't do what he says but I warned him this would happen years ago as he never follows through, doesn't do positives and issues ridiculous threats.
I have done the whole positive language thing and told him the behaviour I want to see etc but in the heat of the moment he doesn't respond. He's extremely strong willed. We have had a difficult relationship in the past I finally feel more connected to him, I don't want to be the bad guy all the time.