Could my gf really be stronger than me, even with her being more “chubby” and me being more “fit”?

*Story for more context—

I’m 5’9”, 160 lbs, 21 years old, skinny, pretty decent strength; girlfriend is 5’4” 225 lbs 24 years old, arguably has much more fat on her than me. We started to annoy each other just for fun and we would even lightly poke and shove at one another, arguing who was stronger. After our little back-and-forth subsided, I noticed her buttcrack hanging out of her shorts, so I thought it would be funny to pour a tiny bit of my water in it😅 She jumps, laughs and says “Ok that’s it buddy”. What at first seems like the usual playful pushing turns into us in a wrestling stance. After a minute of us trying to get somewhere, I try many different things, like lifting her thigh and pushing her shoulder to offset her balance, but she then quickly lifts my leg off the floor with no trouble, and does some motion that had me on my back, her on top, and her arm completely clamping my neck. I tried for minutes to break free, but could not get myself to do it; I wasn’t sure how there was so much strength in her hold, I could not get her to budge at all. She then let me go and the second I tried getting up and grabbing her to continue my battle, she completely sits on me, butt and all, traps my arm under her thigh and pins my other arm down with her hand. Same thing, I tried so hard to get loose and even tried to maneuver out from under her butt and nothing budged. There were a few lucky periods where I was close to getting out but every time she would end up on top with an even stronger grip. She didn’t seem to have any trouble and I could not believe the strength that there was. She then says “Ur done, I beat you, told you so”. I called it quits. No personal issues came from it, we kissed and went to bed. So I’m not saying it’s a bad thing, I actually think it was kinda impressive. I’m just wondering if it’s really true that she, being a chubbier woman could actually be more powerful than me, it just seemed surprising. Granted, she’s definitely curvy and has a more busty, solid build. But that’s the thing, if she’s a woman with more fat than me, less cardio, etc. how could she outperform me being a more fit, slim man? I just don’t believe she could genuinely be stronger than me.