People enter your life for a reason but no one stays forever. Enjoy the moment and don't be surprised when that time comes to an end because it was always going to come. Be thankful for what they've already blessed you with.
Yes! I agree children need discipline but people get so judgmental and mad when a three year old is having a bad day. Your kids weren't perfect and neither are any one else's! So stop judging a parents parenting based off a one time meeting.