You may want to rethink the "rumors about another man". Why? Because he may get even worse and you may have him in your driveway more than what you do now. Also, he will then give your D10 the third degree even more so.
What he's doing is just called "annoying the h@ll out of you". I'm sure he gets all of you text messages just fine. He's telling your daughter that so that she will run back and tell you about it. Ignore anything that comes out of his mouth unless it is truly something you need to know about.
PA at its finest.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.