I am not exactly sure of your DB coaches advice but does he think you should have any boundaries at all?
Certainly sleeping with him could be dangerous to your health.
I do believe continued pursuit is not going to bring him back.
What 180's is your coach advising and why?
Did not discuss "boundaries" with DB coach at all. We mostly talked about a stragegy to initiate a conversation about his not offering up his secrets. As far as 180's go, she asked "how do you feel when H comes home after being gone most of the day on a weekend" and I said he probably sees me as sad and moody. So my big 180 is to Act As if and be positive and happy and be someone he wants to be around. She also said that by me acting that way, it further justifies in his mind "why not cheat? she already believes I am so I might as well
Me - 49 H - 56 S - 23 D - 20 Married 25 years H moved out 10/11/13 H moved back in 10/13/13 H moved out again 8/1/14