I think this would be an interesting idea to implement. Although, maybe 1. ask his mom to get a separate phone, specifically for your friend to call her and 2.

I think this would be an interesting idea to implement. Although, maybe 1. ask his mom to get a separate phone, specifically for your friend to call her and 2. for her to keep it on the line, constantly. now that is pretty iffy, but it's a quick hack. although I think a program would be much better, obviously.