Ex MIL keeps asking me for money

Oh do bore off.

Mental. I'd be tempted to say "yes he gives me £30 per week so you've taken a third of that for this one day. I will tell him not to eat for the rest of the week shall I?"

What sort of a DGM asks her DIL, whether current or ex, for money to see her DGC? You need to say no, OP, and explain that as it’s too expensive for her to see her DGS without financial input from you, she will simply have to forego seeing him as you can’t afford it.

What happens when he has contact is out of his pocket. Tell her that and how much CMS he pays

Next time she asks, just say no thanks. If she asks why, just say you have let him go because you thought she wanted to spend time with your son, but as it's something you have to pay for, it doesn't work for you. She's 100% giving the £10 back to her pathetic son.

Tell her that her son gets a reduction in his CMS due to the overnights so he can pay her that money.

She has clearly been fed a sob story about his money grabbing ex taking him for all he is worth.

play her at her own game her son pays £30 for 7 days that’s £4.28 a full day so overnight is 1/2 of that send her £2.14

be money well spent just to piss her off

BIL is a higher tax payer mostly working over seas tax free.

His first wife wrecked her career bringing up his kids as he got promoted with tricky long contracts.
She doesn't get enough CMS to cover that.

His kids don't get enough money because their friends have more stuff.

His second wife thinks that BIl gives too much money to ex wife and kids and she wants to retire early and go to Japan for six weeks.

My in-laws think the sun shines out of DHs arse and that first and second wives should just be grateful that they spent any time with him.

BIL has always been miserly, from childhood to student house shares, to buying a round to an ice-cream for his kids. Always small, always a win if he consistently gets the better end of a deal.

So interesting watching from a distance. £30 - I bet every one sees that differently so generous, so begrudging, so pointless. It genuinely goes nowhere in the huge pit of childhood expenses.

Just say no. However, not everyone has experience or knowledge of child maintenance. She has probably been led to believe that he's paying huge sums in child support.

Personally I would say the ‘no’ with a bit of explanation as her son may be lying to her.
’Dear MiL, your son pays me £30/wk. Obviously I am not able to feed, clothe and house DS with that. Are you able to live on £1.560 per year? Apparently to house and feed him, without taking into account any other costs, at £10 per night you would require £3,650 per year. Giving you 1/3 of that £30 each time he sleeps at your house would deprive my son for your benefit which I am not willing to do. If you cannot host your grandson without payment, you will need to either ask your son or stop hosting him.’

Just tell her she’ll either have to

1. do activities that don’t cost any money
2. pay for any costs herself
3. ask her son to cover any costs

Not unreasonable to refuse to give her any more money, at all.

Send this exactly.

Yes, this is what you should do.

As your ex is only giving you £30 per week, one night would equate to £4.30, not £10. And that should include her providing clothes for him, as well as food, entertainment, doing his laundry, etc. As it does for you.
The pair of them are taking the mickey. I'd say no and you can't afford her rates. She's asking for what would be nearly 3 days' maintenance for one night. As you say, she's not doing it as a favour to you.
She's probably giving the money to your ex.

Just tell her she’s welcome to see him, but you don’t need a babysitter so it’s not payable. If she wants paying to spend time with her grandchild then that’s between her and her son

Don't be ridiculous, there's no reason for the child to be involved in the discussions around money, just as I'm sure hes not aware that his dad only wants to spare him 30 quid a week, which I'm sure would be far more hurtful, but then you've not got a woman to blame for that one.

I agree with this

What a ridiculous post.
The OP said she was giving grandma £10 a day out of the princely sum of £30 she gets from her ex per week.
If grandma can’t afford to have OPs son for the day, she should ask her own son to help.

Don’t feed the troll…

Wow. He only gives you £30 a week and she’s asking for money? Seriously, tell your ex and ignore her requests.

I would literally just say "No"

No, is a complete answer. No need to go into the ins and outs. If she wants to see her grandchild she can talk to her own son.

Next time, tell her to speak to her son for the money.

This. It's outrageous that she is asking for a third of your weekly CM. I wonder if your ex tells her he gives you thousands rather than the real pittance.

Response ‘I see. The cms payment does not cover any costs on ex’s contact time with his son. You see ds on ex’s contact time, please ask him as ds’s dad in the future if you are short of funds.’

If my ex mil demanded money everytime from me for spending time with her Grandchild I would tell her where to go.

it’s HER choice to see him. What his father pays his mum is completely irrelevant to spending time with his Grandmother.

The child obviously lives with his Mum so she has all the day to day living costs of having a child to content with and the father contributing a mere £30 a week wouldn’t even cover half of what her outgoings would be.

it’s extremely vindictive, grabby behaviour. The IP has every right to refuse to pay her just as she has every right to move on with her life and get married.