I’ve NC for this because if it’s linked with previous posts of mine it could potentially be identifying.
I’m becoming increasingly exasperated with my SCs mum. She is constantly demanding (not asking for, which would seem nicer in the circumstances) money.
A bit of backstory... DP pays well above CMS amount, pays for mobile phone contracts for the kids, all the expensive uniform bits (bags, shoes, blazers), pays off all haircuts, pocket money, treats for the girls, any trainers etc as they are usually the biggest footwear expense... you get the idea. We also have the kids officially EOW but I can’t remember a single weekend when we didn’t have them for at least one night which is lovely.
Their mum hasn’t worked for around 6 months now and I believe she is looking for a new job so she has my sympathies there. She has a long term partner who doesn’t live there officially but he’s there 6 nights a week minimum and doesn’t have a home of his own (so no rent / mortgage or associated bills).
Anyway, since DP and I started house hunting after saving up a good sized deposit between us she must have found out and is now continually asking for more money, saying things like “I know you must have XX amount in the bank for the deposit, you should give me some”.
It’s really getting on my nerves. We saved for a long time for the house deposit and cut back on all unnecessary outgoings which was difficult with 4 DCs between us.
SC’s DM on the other hand is frittering away money like it’s water. Since Christmas (bear in mind she doesn’t have employment at the moment) she has spent £6.5k on cosmetic surgery, upgraded her car and bought a lot of designer handbags and clothes.
Normally I wouldn’t give a toss about what she spends her money on, it’s her business, but the continual texts and calls for cash from her and really starting to piss me off. I can only assume she’s spending redundancy money but is now running low. BUT she should have been more careful if she knew her income was limited.
For example... DP at the start of the school year gave her 75% of the money for a bus pass for the eldest to get to school. Bus pass was never bought (I suspect the money was spent elsewhere) meaning their DM now pays almost double the cost in bus fare. She’s complained to us several times about this but she chose not to get the bus pass (she only had to contribute an extra £50 to it at the time).
She has been pleading poverty and DP has agreed in the short term to up the maintenance by £50 a week to help her out, so she’s now getting an extra £200 a month on top of everything else because he doesn’t want the kids to go without.
Yesterday we got a call “I bought eldest some new jeans for £40 so you’ll have to transfer your half of the cost over to me later”. I am gobsmacked 
She also got eldest SC to call us and say that their DM had bought tickets to a concert for herself and her niece but we’d have to pay for her ticket (£85) because DM couldn’t afford to pay for all 3 of them.
DP is raging because it’s put him in a horrible position because we simply do not have the money and he is raging she’s asked him to pay for their day out! We would never dream of asking their DM to pay for the kids to do activities when they’re with us
So now SC isn’t going to the concert and her DM is taking her older cousin!
Yesterday took the biscuit though... DP has just paid £250 for new glasses for both kids (special lenses for the little one makes them a ridiculous cost)... no issue with him buying them, they’re a necessity. He asked their DM if he paid £200 could she pick up the last £50 as we really are on a shoestring this month. She said she doesn’t have it etc etc so we just paid.
Then last night I was on FaceTime to the SCs and they’d been shopping for the afternoon with DM, all lovely and had a nice time. Eldest is really into her designer goods at the minute and starts telling me all about these designer sliders her mum has just bought and “look how pretty they are”.
They are fucking £260 designer sliders. Is she taking the actually piss?!!!
Sorry for the huge rant! I’m just so cross with her!!! She’s taken us for complete mugs money-wise, whilst we’re scrimping and saving to give her extra support she’s spunking large sums of money away on unnecessary crap!!!!
AWBU to tell her to fuck off next time she starts pleading poverty and asking for more money? (Obviously won’t actually tell her to fuck off but that’ll be the jist of it)
What do we do if she continues to not spend it on the kids’ needs... I feel like we’re stuck because we can’t let them suffer because their mum is spending irresponsibly?