Marriage and the empty nest
A study published in Psychological Science looked at the marriages of mothers over an 18-year period - from their 40's to their early 60's. The study suggested that marital satisfaction increased with age, whether the women stayed with the same partners or remarried. The increase was greatest for those who transitioned to an "empty nest" during the period studied. This increase did not seem to be related to the increased amount of time that women had to spend with their partners, but to an increased enjoyment of the time they had together. The authors suggested that these findings support a need for partners to schedule time together before their kids leave home. You can read more here.