Last week my husband and I got all three girls to go biking with us. This is a much more difficult undertaking than it used to be, when their social lives were completely under our oversight. I didn't appreciate it at the time, but it's been a while, and our twin almost 15-year-olds are constantly busy with friends, school and extra-curricular commitments. And while I like to think they do still enjoy hanging out with mom and dad and their younger sister, it's probably not as high on their list as it used to be.