Did she cheated my brother?

seth900
So asking this for my brother. Is there something wrong with this girls behavior or I am just overreacting. So my brother knew this girl online they spoke a lot online and meet couple times in a way like on a date he paid for her in a cafe and cab etc. So he decided to bring this girl lets say to a Christian community night everything was fine she was with him having lunch and with a group of other people. So she went to take food and this guy came from church and when he saw her he gave her a hug. I don't know was it because he really knew her or because its his friendly gesture or what ever. They were talking and she later disappeared for half and hour I don't know with him or she was alone, but she didn't told him nothing. When she came back she said like I am waiting for this guy he is my friends friend and that guy came touched her shoulder and it seemed she was waiting for this guy and just seemed for me weird that It seemed suddenly she was waiting for this guy and not my brother and then she was just with him and left with him. Of course she said good bye and later just texted it was nice to come to that community. What do you think is there something weird or just imagining. Just to add up that guy is more taller and seems more masculine.
Did she cheated my brother?
1 Opinion