i had my eye on a pretty new shirt that i wanted to get . my sister got it and it looked great on her . i was so envious . oh wow i am glad she was happy , why were you nervous ? i was n't nervous i was envious . i had really wanted it . oh do n't be , you should be happy for her , there will come a time where you will get something back in return : )
The sister getting the shirt that the person wanted caused the feeling of jealousy.