How can I avoid having to pay for my husband's good deeds?

My husband gave my neighbor a cable box which adds $10-15 / month to our cable bill (which I would disagree with doing to begin with). Our neighbors agreed to pay us the addl box fee each month and haven't paid us in over 6 months. I know they would not mind paying us, but my husband refuses to ask them for the money. The arrangement was made btwn my husband and our neighbors. I don't think its fair that I shoudl have to pay the neighbors' cable bill for the rest of our lives, after all we pay over $100 /month. My husband is the type of person who won't ask people for anything.