How would you feel if this happened?
Okay imagine this scenario - you're dating a woman who has just broken up with her ex after a long term relationship. You've known her for nearly two weeks but things are going great.
Your new girlfriend then tells you she's going to meet her ex for lunch. She wants you to know it's happening, just meeting as friends. During the lunch meeting the ex holds her hand whilst talking to her, has his hand on her back whilst they're walking, strokes her face, holds her face in his hands, repeatedly hugs her, and wraps his arms around her waist whilst standing very close. She raises her sunglasses whilst he holds her close and whilst their faces get close, they don't kiss. She doesn't object to these and doesn't try to push him away either physically or verbally.
How would you feel?