She says she's conflicted

[Oxford1]

This parasite is not worthy of your time or mental energy.
He is just some lowlife scumbag that has exploited a gap in your relationship.

Calling his phone number will achieve what? He'll either laugh at you, manipulate you or use it against you somehow. Why give him the satisfaction?

There is only really one legal and moral way to get rid of him.
Show yourself to be a far better man than him. Show that you are capable of fulfilling the needs that this clown is doing, but much better!

At the moment, everything you're suggesting is playing straight into his hands.

Yes your right. The fact that she is starting to wonder if he is controlling I think shows she may be questioning this OM.

She even keeps telling me she loves me, kisses me hello and good-bye.

I have to show her I am the better man.