I think the simple eMail option is best. Just keep all the moves in each mail. Send the first move in your first mail. Maybe if they get an internet connection on their farm she could consider the site option.
I'll send you the address.
Did you ever play Carrom? We had a championship board shipped over from Bombay. You can get hand-made ones in the UK. There used to be a stall in Covent Garden. Not sure if it's still there.
Anyway, I'm a big Carrom fan. Not into chess much. At all, in fact. Cribbage and Backgammon are more my style.