Definitely through her tummy.
I awoke this morning to pitiful little meows, and then she jumped into bed and cuddled very close, purring as loudly as she could manage. She usually wants nothing do to with me until I'm trying to do something else. "Bet her food bowl's empty," thought I as I drifted back to sleep with my face buried in fur.
I was so right.
The affection she shows her mommy directly correlates to her needs at the time. If she's hungry or cold, I'm the most awesomest hooman and she loves me to bits. If all of her needs have already been met, I'm furniture. Or a particularly entertaining chew toy.
Cats are amazing creatures.