Seems a bit mean to ask for the money after all you did for his wife ! Maybe you should have told him how much petrol and hospital parking you paid ...you could mention it light heartedly and see what reaction you get ! I have found people will take advantage if you let them ...my DH had work friends from years ago who decided they would now have 'our home in France' ...aka as our house ! Since it was quite large they had their own en suite ,,,,but because 'we can't unload the car as we are on our way to Spain to our yacht'...guess what ? they wanted to go sightseeing so we had to use ours ...then pay for coffees and lunches ..they did once say Oh we will take you out before we go !,,,however there was always an excuse for them not to pay ! to crown it all when they left early in the morning 'we won't disturb you ..we will get out own breakfast (our food of course ..I even had to go shopping especially as 'oh, my husband can't eat that '..or on one occasion 'yes a jacket potato would be lovely ...do you mind if I come and watch you as 'my husband can't eat that butter'...or this cream, or that milk ......when they arrived she pushed all my food to the back of the second fridge we had in the sous sol and put hers in ! They invited themselves again on their way back to the UK ! happy I was not ! Then happily we moved to a small bungalow so when they invited themselves the next time I just sent them a brochure of local gites and B and B's ...wonder why we never heard from them again ?!!!
I use Boots UK online for anything I cannot get here ....and you get a Boots discount card !! Clothes that I buy from the UK websites I seldom have to return, except sadly those from M & S that were terrible quality and not what they used to be ! Bon Marche UK suits me ..its cheap and the clothes fit my lifestyle, for which I never need expensive stuff ! In the Autumn I ordered a red spotted mac (think ladybird !) but they sent a purple jacket by mistake ..when I rang them to say I would send it back as it was the wrong item unbelievably they said keep it, or give it away ,,and then sent the right item free of charge ! and I gave it to a local charity collector ..will definitely use them again !
Lesson learned for you ...next time just tell the husband you cannot afford to do all these things any longer .....sadly . If you will want to help the wife with her appointments, etc then that is up to you ...but I would learn a lesson and never ask him to do anything again and likewise never buy anything for him ! People can be very thoughtless either deliberately or without realising ! Have you mentioned how you feel to him ? Next time if there is one, you could say when he says Oh that'll be 20 ..say ok I will deduct it from my petrol bill !