My husband lost sleep over this.

I could not sleep at night if I allowed a Pit Bull in my property and it hurt someone.

Some landlords look the other way when people are sleeping in rooms without egress.

How do we convince her that we will be showing our condo without her presence and not have her lose sleep over it (my sales people, where you at)? 

We really need to move in tomorrow because my aunt doesn't want us sleeping on her couch anymore.

Never sleep with one, never loan money, and never, ever offer an oral agreement outside of the lease contract.

The couple must also be treating their relationship as married by things such as filing joint taxes and changing their last names.Lots of jokes about losing your GF/sleeping alone/etc.

Law students only have time to study and sleep and eat.  

I know we don't have that many days of heat in the summer, but the humidity makes it very miserable to sleep at night and they have kids.If they we not good tenants, I would not even consider A/C or extending the lease.

She has no case.She illegally subleted your property to an unauthorized tenet and profited from that action.She will lose immediately either in small claims court or a preliminary hearing.Don't lose any sleep over her crap and refer any additional communications from her to your attorney.In the meanwhile,I would start to eviction process with the current occupier of the property.