Last week I went by the house to get things, and I saw her get into his car.
She was back in about an hour, so-- again, it's plausible that they went to lunch. He is a person she would be hanging out with through this, they hung out a lot in the past and never hooked up.
so I confronted her the next day directly and her body language seemed convincing.
It is just a strange place to be in. If I am at least not suspicious, I am a fool. But if I accuse and it is just as she says-- friends (as they always have been) I look hysterical.