Kristin Cavallari, 37, goes public with new romance with model Mark Estes, 24, as they vacation(02)

Kristin Cavallari, 37, goes public with new romance with model Mark Estes, 24, as they vacation(02)

Image gallery: Mark Estes Nudes

Kristin Cavallari & New BF Mark Estes 'Are Taking Things Slowly' Kristin Cavallari, 37, and boyfriend Mark Estes, 24, dish on their 'hot' sex life in saucy NSFW Kristin Cavallari, 37, goes public with new romance with model Mark Estes, 24, as they vacation