An upvote with 10 sp will only have a 0.001 or less upvote value. Honestly, that isn't much. you will almost never get a curation reward from sp of that amount. and if you do get some it will not be much. And If you stay offline you will not get any rewards. Qnd this case your husband was offline for almost a month. Why would you? you are not curating or posting something that would allow you to gather any rewards at all.

Now the answer to you question is yes, They will just stay there for ever, unless steem pulls back the uncollected rewards by adding a protocolnin a future hardfork that will allow them to do so. But until then your rewards will stay there. Just explore Steem "FAQ" section and you'll find all your answers there.