Dictionary
sec'ond home'
1. an additional residence, as at the shore or in the country, where one goes on weekends, vacations, and the like.
2. another residence, as of a close relative or friend, where one spends a great deal of time or feels welcome and at home:
Aunt Sue's house was my second home.
3. any place where one spends a great deal of time:
My office is my second home. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.