To not give them the rest of the money

[careeristbitchnigel]

BIL and SIL live with us.

Yesterday they went to Sainsburys and I asked, very specifically for them to get me "20 own brand 2in1 dishwasher tablets but not value". These are £3 at the moment. I have £15 left for housekeeping until payday.

They bought 54 Finish tablets which cost £8.

WIBU to tell them I am not paying the £5 extra as they did not ask what they were very clearly told to buy ?

I couldn't say whether £500 a month for each of them was fair or not. You may not be paying a mortgage. Your bills might be low and you may be expecting them to live on smart price beans- in which case, I would say £500 a month was fair. If they are paying their fair share (i.e. all bills are split in 4- 1/2 for you and your DH and half for them) then it's fair. If you are spending hundreds of pounds a month while they are sitting back getting an easy ride- that isn't so fair.

If they aren't paying their share OP then put your foot down. Either they pay half of all costs or they would be out on their ear with me. Assuming they are both in FT work. The fact they have been out an brought a "expensive car" suggests they have more than enough free cash to spend.

It sounds like they are taking you for a mug OP. Put your foot down.