Hi,Apologies in advance for long post.. We are a brand new blended family and I am really struggling with the behavior of my DSS. My DP has a 7 year old boy and I have a 7 year old girl. We share a 1 year old girl. My DD spends 3-4 days a week with us and my DSS spends 1 day a week with his dad. I split with my long term partner and after a few years of heartbreak met my DP and within 15 months she was pregnant. I love our baby daughter dearly. My DP and my DSS moved into my 2 bed luxury bachelor pad just before the baby arrived. I am renovating a much bigger home as the flat we're in will be way too small. I have a big disposable income as I own a big construction company. My DD and DS get on very well although there is a big difference in their behavior at times. DSS is spoilt by his father when he sees him and they are always in the toy shop and he allows him to play adult video games. He's generally a lovely boy but there's no doubt that if he doesn't get his own way he'll tantrum/cry til his mum gives in. At present the children share a bedroom and have bunk beds but the issue revolves around bed times. Its no real issue on school nights as they both have to be up at the same time. It all came to a head in the summer holidays. DSS had to be up at 7am for a football match and my DD had ballet at 12pm. My DP said it was bed time at 9.30pm and DD asked me if she could have her ipad in bed. I ymore. Her room is no longer hers and its not quite the home we had. My ex and I have really made her our priority. As a result she is very happy, confident, popular, well balanced child and doing well at school. I love my gang so much and really want things to work but I darsaid yes, with headphones so as not to disturb DSS. DSS threw a tantrum as 'it was not fair!?' 'Why can't i have my ipad!?' I calmly explained that he had a football match and needed to be fully rested. I fully expected my DP to support me but she went up the wall saying I'd undermined her..! Unbeknownst to me she had already told both it was bed time. This caused pandemonium and DSS went to bed crying. My DP then went into the children's bedroom and asked my DD what time does your mum normally put you to bed?' This then made my DD feel guilty and this was all her fault and she went on to secretly face-time her mum saying she wasn't happy. I spoke to my ex the following day and she agreed with me that because one had to be up earlier than the other the other shouldn't be penalised. My DP keeps bringing this up and I was looking for some other opinion.s My DD regards both mine and her mums as her home but recently it seems to not be her home ane not even attempt to discipline my DSS as my DP would go up the wall. My DP devotes the majority of time to her son and I feel she treats him as the alpha male and he knows it. I treat them both well and take them all on holidays and regular days out. MY DS has regular tantrums and I am worried that his behavior will eventually have a negative impact on my DD. If i try to discuss his behavior or even this particular bed time issue i'm normally responded to in a very angry demeanor. The bed time saga has really focused the issues and things seem to have quickly spiraled into quite a frosty atmosphere though the children still get on very well. My DD is even aware of the ability of DSS to tantrum and will often attempt to diffuse any situation immediately. We went to the funfair recently and me DD and DSS had a go at a game. DSS went first and lost, DD went second and won, she immediately gave her toy to DSS who gladly accepted it. I went third and won ad donated my toy to DD. I was very proud of her but i'm starting to resent the fact that DSS has no respect for me and always gets his way. if i'm wrong with the case of the bed time then i'm happy to put them both to bed at the same time. I look forward to any helpful comments.