looking for ways to convey “warm up”

how would a japanese person translate “warm up” in the context of getting warmer when it’s cold out? both transitively and intransitively.

“it’s freezing, i really need to warm up.”

“i’m sorry i’m not home yet to warm you up.”

doesn’t have to be literal as i know some words can imply a sexual connotation like 温める

by onestbeaux