You should always replace your friend's things that you ruined.
Chelsea spills coffee all over a sweater that was borrowed from her friend Megan.
Chelsea wants to bring Megan a sweater.
Chelsea goes to the store to buy Megan a brand new sweater.
Chelsea returns the stained sweater to Megan.
Megan is impressed with Chelsea's honesty, and they continue to borrow each other's clothes.
Megan loses her trust in Chelsea and stops lending her clothes.