For background DH and I have an age gap, a shade over twenty years in fact 
This has never hugely concerned me and we have been together and (mostly) happy for twelve years.
DH is now 67 and has today announced that he thinks he may as well drop a day a week. Currently he finishes early on that day anyway as we have a volunteering commitment, so in fact would be dropping between 5 and 6 hours.
In principle I don't have an issue with it, in practice DH has no pension (a problem for a whole other thread
) except his state provision and dropping a day would already swallow up around half of that income.
Financially we could afford it, but it then allows us much less leeway to save for the time that he cannot actually work, or will be impacting on our currently rather pleasant quality of life.
I think what is pissing me off is that I fully expect to have to work until at least my mid 70's if I'm still able and I have some small private pension provision as well. I get that times are different now and this is one of the hurdles with an age gap relationship, but I'm genuinely wondering whether I am BU and I should just cut him some slack, or he should just knuckle down for as long as possible?