Your guest bring you an old painting,which ou have always liked.As far as sheknows it's worthb nothing.A year later you

As I understand that painting is a gift, so I don\'t have to do anything. If I like the painting, I will simply keep it. If I need money, I can sell it. If my guest needs money, I still may consider selling the painting and give away a half of the revenue to my guest as I was the one who found out the real worth of the painting.