Ok - he is not officially my stepson as his dad and I aren't married (before I get flamed!).
My OH is in the forces and away for 4 months his 16 Yr old DS still wanted to come and stay for 2 wks which I thought was lovely. Paid for him to fly down everyone all excited he's gets on really well with my 3 (14, 12, 10) and it's all great.
Thing is he has come with about £50 spending money which is seriously burning a hole in his pocket and we are doing days out etc and he's buying things for himself left right and centre and I cannot afford/do not wish to buy for my DC. I went to get us all a sandwich for lunch earlier and he was going to go and get himself a KFC, I stopped him but he's bought loads of sweets and crap (I think at the airport) and didn't eat his dinner last night so he isn't having the greatest diet (I know it's only 2 wks but still).
He also paid for himself to have a go on those rip off water ball things in town today while my kids stood and watched.
How do I tackle this he is being brought up in a household where he is the only child - I don't want to upset him but I don't feel the situation is very equal or fair on all 4 children!!!!