Could my girlfriend really be stronger than me? Even if she’s more “chubby” and I’m more “slim” or “fit”?

I’m 5’9”, 160lbs, 21 years old, skinny, pretty decent strength; girlfriend is 5’4” 225lbs 24 years old, arguably has much more fat on her than me. We were annoying each other just for fun and were even lightly poking and shoving at one another, arguing who was stronger. 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 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 a motion that had me on my back, her on top, and her arm clamping my neck. I tried forever 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. She then let me go and when I tried getting up 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, even tried to maneuver out from under her butt and nothing budged. There were a few lucky points where I was close to getting out but she would always end up on top with 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 from it, we kissed and went to bed. Not that it’s a bad thing, I’m just wondering if she, being a chubbier woman could actually be more powerful than me, it just seems crazy. 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 see how she’s genuinely stronger than me.
Could my girlfriend really be stronger than me? Even if she’s more “chubby” and I’m more “slim” or “fit”?
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