I can't say for sure what's on the mind of the OM. Although I did have a few flings with single older woman in my early 20's, the thought of a long term relationship with one was like last on my list of priorities.
I can't imagine that lasting unless he's looking for a mother figure.
I'm not so sure you should be concentrating so much on OM anyway. Even if it doesn't work out, there are still underlying issues for you two to resolve.
"It is curious that physical courage should be so common in the world and moral courage so rare." -Mark Twain