From what you described it sounds like the problem is at the other end of the call, that is, at your husband's family's end. Do they have the same problem when they're on a call to other contacts?
What type device is your husband's family using? Mac? Windows PC? Etc?
I have same problem when I am calling India on Skype. Both machines are Windows. In India - Windows XP and in US - Brand new laptop Windows 8. In fact, I bought a very good HP Laptop in January 2013 and returned it thinking that it is problem with HP (conflict with Beats Audio which is not correct). I bought Toshiba Laptop in March 2013 and it has the same problem. Now someone says it is a Windows 8 problem.
Anyone from Skype or Microsoft here listening to users... Please help...
I have this problem too with my HP ENVY m6-1310sa. It seems to be the Beats driver. I changed to a generic one and the skype problem is gone. I think it's to do with Skype compatibility as I don't have this issue at all with other audio/communication applications.