Ds1 (12) has a big trip coming up next summer. He will be going abroad for a week with his school. The total cost will be about £900, £200 of which is the spending money (that is the maximum they're allowed to take). I have nearly paid the initial £700 - I've been paying installments since earlier this year. Ex has contributed nothing and pays no CS either (CMS are involved but he's on a very low income so there will never be much coming from him).
Ds has about £500 pocket money saved up. He has another savings account with more that can't be touched until he's 18 so this is just money from birthdays and Christmas etc that he's never wanted to spend. I've discussed with him the idea that he makes a contribution (probably 50%) to the spending money for the trip from this account. He's more than happy with this and it seemed fair. The spending money is for lunches (other meals are included in the upfront cost) and non-essentials, so this would be me paying for meals and him spending his pocket money on anything else he wants when over there.
Now ex has started saying that ds1 needs to go 50/50 with ds2 to buy a laptop to keep at his house. This is because ds2 is constantly on ex's laptop which he needs for work (wfh) and ex seems incapable of providing other activities for ds2 to do. Ds1 has a phone and would never use the laptop but ex wants his contribution because without it ds2 doesn't have enough money to buy one - he has less money saved because of his age and because he spends lot more!
I KNOW I'm not being unreasonable to not allow this because ds1 doesn't want or need a laptop, but when he told ex what his money was being kept for ex apparently 'went mad' because I should be paying for that trip and most of the money in that account has been contributed by his family so he has the right to spend it with ds. That's not true anyway but what do I do? Ds hasn't told his dad the figures and knows that he could still make contribution to the laptop even without the £100 spending money. He's now saying he wants to pay it, essentially to keep the peace. He points out he never uses his money for anything and that he would be able to use the laptop if needed, but he has access to a laptop at mine and has used it about 5 times this year!
WIBU to refuse to hand over the bank details?