Empty Nesters

https://www.theguardian.com/lifeandstyle/2016/sep/17/ten-ways-for-parents-to-survive-an-empty-nest?CMP=twt_gu
http://www.wikihow.com/Celebrate-Being-an-Empty-Nester
http://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/empty-nest-syndrome/art-20047165