@jehjeh How totally dispiriting for you! There are 2 things that come to mind that you could try. #1 is to have another conversation about having some help because you can’t do it all and if you get sick, who will help him? #2 hire the young man for another shift and have him help you, but be sure your husband sees him and how helpful he is. You may have to talk with the young man before hand, so he understands and will cooperate.
How do you think your husband will react?
Just some thoughts