Grandma: Kari's Mommy, try to exercise a little...
Kari's Mommy:  Mom, I don't have a lot of time! Too busy lately...
Grandma: You can always find time for that. （時間是自己找的。。）

Kari, waving a finger at Mommy: THAT IS TRUE!! ( 没错!)    

Adult conversation. Mini-adult's third-party opinion.