Tim: I envy my mom's ability to quit eating sweets for longer period.
Tim: She sometimes does that to prove herself she can.
Kimberly: Haha. When you put it that way...
Kimberly: I envy your mom this ability too xD
Tim: I don't know how strong is her will
Tim: But that's one hell of a achievement
Tim's mother can give up eating sweets for a longer period. Tim and Kimberly envy this ability.