Maria had been willing to do whatever she needed to in order to make Liz feel better -- especially after the attitude of that last person she had been doing a psychic reading for. No one got to say anything like that about Liz within her hearing.
It hadn't been hard to get the band to play Liz's song for her. In fact, they seemed to be happy to do so after a few smiles and some harmless flirting. (It probably helped that she knew them from other times they performed for functions).
When Liz came running back to her, she couldn't help grinning as they started dancing together. After ten years, many things changed, but sometimes the important ones stayed the same.
Of course, that was all well and good when weird things didn't happen all of a sudden. Like the fact she and Liz were sudden;y standing in the snow.