Question for the plus size females?

I've never dated a BBW before, and recently broke up with my ex who wasn't one. I'm athletic myself. She's 23 and took karate. I saw her get into a fight with this girl who's a BBW and my ex had talked trash to her. It came down to an actual fight and I was sure my ex would destroy her. My ex threw a straight karate kick at the middle of her stomach and I pretty much thought it was over right then. It was....just not how I thought. The BBW girl didn't look worried at all, she had both her hands down by her sides. As my exes kick aimed right at her stomach the BBW chick sorta cupped both her hands down where her belly button was, that area....and it shocked me bcuz my exes foot dropped right into both of her hands perfectly like a apple from a tree and I was like😮😮😮the BBW chick gripped it with both hands. My ex couldn't do anything cuz her foot was being held. She sorta hopped trying to keep her balance and yelled and cussed at her for the BBW chick to let her foot go but she just went😏😏and held it firm with both hands. Finally my ex had enough and begged her almost crying to let her foot go and saying she was really sorry. My ex ended up losing badly. Watching that I was like totally stunned😨😨. Is what the BBW chick did something that you'd normally do if faced with a girl who took karate? I didn't think that could happen AT ALL😫