Have you been able to forgive your dad for having an affair and your mom for the temporary break-up, then getting back together again? All that stuff messed up the dynamic of your family big time. That means it impacted you, as it is still doing. Maybe the place to start is trying to find forgiveness in your own heart for them messing things up.

Slowly, over time, things may improve, but right now, they're both probably walking on eggshells ... and maybe afraid that if they talk to you seriously about anything that you'll tell the other parent. So maybe fear and distrust are lingering below the surface of it all. Your dad's affair was the problem, not you telling your mom. But people have a tendency to resent the messenger, which is wrong, but that is, unfortunately, the way most humans respond. They're only human and that means they'll make plenty of mistakes in life. If you can forgive them for upsetting the entire family dynamic, things may slowly improve. At least, you'll know that you're doing the right thing, even if they take longer to settle down.