Friend caused extensive water damage to my other friend's house
I am house sitting for Liam (friend #1). I invited Anthony (friend #2) in for a minute while I watered the plants. We were on our way to a movie. Anthony left a faucet on in Liam's paint studio where he wasn't supposed to be in the first place. When we came back the entire first floor of the house was flooded. Liam has a lot of Buddhist antiques, cushions, rugs and paintings all of which got soaked. Anthony said he would go out to buy paper towels but never came back. Is it normal to feel personally responsible for another friend's mistake?