Carol was expecting to go heated and quick, and while the kiss with Han is heated, there's no rush to it. So Carol shifts herself into slow goodness and sinks into his gravity. Not even a superpowered Human/Kree hybrid stands a chance.

The height difference between them is negligible as she comes in around 5'11", but the solidity of him makes her almost feel slight in comparison. Carol is all lean muscle, a product of her enhanced metabolism, military background, and constant heroics.

She's used to people of Han's solidity, but not in this contentment to be close. So Carol finds herself pressing closer and sliding an arm around his waist so her hand can explore up his back.