What does "it's warm" mean?

There was soup in the pot. ‘Soup means lots!’ Dexter would say when he

came in. Where were they? She propped the Kabalevsky open on the piano

and tried again. She had laboured through a dozen bars when the car slid

down the driveway outside the kitchen window. More than two doors

banged. She got up from the piano and took a knife to the rest of the loaf.

Dexter flooded in on a tide of cold air. He loved coming home.

‘Athena! Look who’s here!’

The three women stood still and stared at one another.

‘Sisters,’ thought Athena, with that start of wonder which family

resemblance provokes. ‘Big one’s tough. Little one’s miserable.’

‘She’s beautiful,’ thought Vicki. ‘’it's warm. I wish I could live here.’ Her

chest loosened and she began to breathe.

Does "it's warm" mean: she is friendly