I am 14 yrs older than my youngest sister. When she graduated from high school, she moved cross country & moved in with my husand & I and our 3-1/2 & 4 yr old sons. I had an instant 18 yr old daughter. Horrible. Mind you I had not been around her for 8 yrs as I had moved away. But we finally all agreed on some ground rules & the bottom line was that as long as she depended on us for ANY financial support, she was not independent. That included free room & board, food, etc. This was an excellent learning experience for my husband & I, so when our boys got older, it was easier. They had also learned the expectations. We always told them.... your job is to go to school & do the best you can. If you do your job, then we will do ours & provide for them. We have been blessed & they have grown into decent responsible individuals. One is in law school & the other is a Border Patrol Agent.