The man that owned the condo next door had two adult sons that lived with him. 

He mentioned that if things don't go well for his adult son, he may come join him later on.

@Brett Goldsmith Executor probably is not an accurate term, I should have used next of kin to describe her adult children who live there still.

I think pet owners are more responsible on the whole and have seen a drunk adult do far more damage to a home than a cat would or could.  

So, to summarize:Very loud and disruptive tenant (domestic disputes in nature).Potentially has one to multiple people not on the lease living there now.Defensive and unapologetic behavior when I speak to her.Pays on time.I have a lease with her that ends June 30th.The lease mentions Household Size and that any adults, or otherwise, living there apart from the tenant can only be allowed to live there by the written consent of the landlord.

Such as a mother and adult child, cousins, adult siblings.  

Adults design a plan and follow it.' 

. :)I have been in real estate my entire adult career and I'm somewhere north of 37,000 hours of "practice."

A good thing especially for young adults who have student debt. 

Usually a “rough “able bodied adult on a “ fixed income” is code speak for : Welfare rat loser who refuses to work !