If it were me, I'd take it reeeal slow while your W makes this transition. No time limits, no ultimatums. Respond and maintain contact, be warm. But as long as she has contact w/ OM, the content of your conversation should reflect that reality, i.e., don't let your optimism push the conversation too far into the comfortable marriage territory.
But heck, what do I know....
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final