It's DP's birthday tomorrow and we were going to have a casual meal out at a nice pub (my treat). DP has just invited his brother to join us. He's nice guy, 30, bit immature for his age, single, doesn't have many friends and doesn't have a lot of money. The family kind of takes pity on him for every little life difficulty he faces and spoil him a lot. Which is why DP has invited him.
I'm totally fine with the brother coming along. But this also means I'm going to have to pay for DP's brother's meal too (it will end up being £50/60+ per head with desserts and drinks). I can't exactly pay for DP's and ask brother to pay for himself can I?