If I lose the bet, you get 20BTC sent to that address (13dSK4663Ts7j2PwHS1eUVjycKLBwx7PJM). If you lose, you'll need to send 20BTC to my address.
for anything other than the better getting 20btc, wouldn't you have to be more explicit? (e.g., 20btc will be sent..; you get: 20btc sent to; etc.)
Stop trying to reason with stupid.