One son just started full time work, earning £300pw, the other earns £75pw part time. I asked one for £40pw the other for £10. Full time twin found out and has gone ballistic (smashed my living room door ballistic) as he thinks his bro should pay the same, I say, it should be on a percentage. I may as well have told him I loved the other one and not him by his reaction. I see it as fair, yet he's livid. Am I wrong? The boys are 18.