Hi Hopeful, go with your gut feeling. Is she sleeping over the OW house? Those e-mails really do tell a story especially about the ring. Is the ring inscribed? If so with what.

If you want confirmation get a PI. Once you have full evidence you could base your decisions on facts and how to deal with this.

Me 53
H 50
D16, D29
M 22 years
bomb 7/08 INH - alien pod replaces H
8/08 - OW (direct report), I work there also
bomb II - H moves 10/1
expose ow 10/22
D to be final 9-09