NC as outing.
DH's brother and GF moving out and need a big van to help move some of their big furniture. DH willingly offered to help if BIL pays for diesel as they do not live locally to us and would cost us approx £50 there and back.
BIL kicked off saying he shouldn't have to pay and how his gf has given DH numerous lifts in the past and he should be helping his family out, and then dragged me into it saying ever since we've been together that DH's not there for his family anymore!
DH offered to come up in our car and help out as petrol is a lot less and we wouldn't expect him to pay that, however he said it would be useless and no point!
I do not get on with BIL anyway so may be biased but me and DH have a baby on the way and we're also getting our first mortgage so funds are very very tight, as well as needing to save for my maternity leave we just can't afford to spare £50!
Is DH being unreasonable by not shedding out £50 that we can't afford to help his brother move? 