Don't talk to OW about anything-if she cared about what you thought she wouldn't be having an A with your H. She will probably think you are either lying or she can change your H.
I wouldn't tell OW's H about this place. It is your sanctuary and OW might get wind of it from her H.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength