Sit back and watch those interactions. Don't let them bring you down. Keep the conversations light and as was suggested, DB them. It's only a few hours, right?
Enjoy your d and her friend. Especially enjoy your concert!
Atsbaby M:36 H:35 T: 19 M:12 S:11 D:9 BD: 5/4/14 Proof of OW 8/13/14-love note from her 8/19 admits OW 8/22/14 files D w/o telling me 9/20/14 Says he wants to reconcile