Looks more like a condescending (or bitter) smile, to me. The mouth shape is slightly smiling, but the rest of the face doesn't match. There is a bit of a blush line beneath the eyes, so maybe it's embarrassed.
What marisa? I can't take my eyes off that horrible foot anatomy. Jeez, this artist didn't even have the decency to follow the 23rd rule for bad artists: "If you're bad at drawing hands and feet then hide them!"
He could have hidden them behind a pillow or under the covers or even under a flurry of those glowing petals. Because they're special magic-imbued petals, you see.