if tat software is installed... sure the gf will know the bf is spying on her...
the gf will get a heart attack when she receive her hp bill coz the sms cost will be tripled coz each in/out sms will be forwarded to the another number...
remember tat the phone bill got itemised billing and listout hp num in the list....
if the gf is dump dump 1 or uses prepaid then finelar...

hmm another thing... how about when we activated sms confirmation... each out sms will send back a report... then the gf phone also know lar..... 
how funny ppl r doing things nowaday... if don't trust ur bf/gf... then dump them lar...
how to be soulmate lar when don't trust each other lor....