When your husband calls another womans name in his sleep?

I won't go into all details because it gets real personal, but if someone has good answer for me I may share it by email so they may understand fully. My husband says in his sleep one night "I don't want to get caught" 2 days later he talks in his sleep again saying "Martha Martha are you seeing anyone else?" now we only know 1 Martha and she is married also. so whats up with this?