Serious help an affair!!?

ok so i have been seeing this guy for a year now - he is married i am married - he is also seeing other woman he tells me, well this morning some girl left him a voice mail, his wife checked it, caught him, but I also left him a voice mail, but she is thinking that it was the same person, do you think this guy will rat me out or will he just let her think its the chick that she thinks it is!? I know Iam wrong for doing this - but I seriously love this guy - i have never been in love before but I also don't wanna leave my kids either. Please give me some advise.