text: 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
target: Tim's mother can give up eating sweets for a longer period. Tim and Kimberly envy this ability.