I put a lot of attention into the expressions. A bit silly, but appropriately so, I hope.
There is a famous painting of Jesus, one of the oldest, that looks a little uncanny, like the artist wasn't very good, until you hold a mirror down the middle, and realize he has two different faces--one symbolizing judgement and the father, and the other symbolizing mercy and the son. It wasn't an inspiration, just a fun fact, and a funnier comparison.

Anyway, she is meant to be expressing gratitude and relief from her heat, while half of his face is meant to be expressing love and amazement at the best sex, followed by the best hug, he's ever had, and the other half is meant to be expressing "I'm being crushed by a giant cat."