Helped a vacationing friend, in a way

• Watched someone's place
• Cared for a home while the owner was away
• Minded the mansion, e.g
• Took care of a vacationer's residence
• Watched a friend's home, say
• Filled in for a vacationer, in a way
• Did home work?
• Provided home security, in a way

Wiktionary Word definitions in Wiktionary
vb. (en-past of: housesit )