Hong, I'm certainly no lawyer. But I've read a lot on another forum about it. Highly recommended to keep a journal or a calendar, and document all your time spent with your kids. Places you went, things you did, time spent. Be as specific as possible, even with things like homework, bedtimes, etc. Good luck
Married: 15yrs Ages: Me 49, W 44 Kids: S12 BD: around 4/14