First time Landlord with Holdover Tenant (Urgent Question)

[Mark Stone]

Thank you in advance for any insight or advice you can provide! I will explain in detail the scenario below but will start off with the abbreviated version (TL:DR) version first.

Thanks!

TL:DR

Tenant suppose to be out end of March but has no job so couldn't find a new place; BF aka help now in jail. She has 2 little girls and no where to go.

More background:

-So, I have a tenant in the back unit of my Triplex on a month to month lease; bf also on lease but he is now in jail for foreseeable future for breaking probation. I gave them notice at the beginning of March in writing that I wanted to end the lease at the end of the month of March. They had led me to believe they had found a place and were leaving. She now says that fell through, and she can't find a job in order to rent new place. Has 2 young girls living with her. She wants to pay week to week until she can find job and a place to move to ASAP. Has money from filing taxes but not enough to last much longer than end of the month. 

-BF (and even GF to a large extent) have been horrible tenants; front tenants almost wanted to move out bc of them being insanely loud in the middle of the night

-BF has drug issues and was bringing people back to the property to likely sell

-I wouldn't mind giving her another week if she paid me a pro-rated amount for the first week of April and then I got her to sell the additional car they bought (old mustang) in hopes that gives her enough money to move out easier.

-My main concern is if I give her another week will that make the lease automatically go for another month or something, and I don't want BF getting out soon and coming back to live there. 

-Could I end the current lease and draw up a week to week lease with only her with stipulations that the BF couldn't live there?

-Or in the next few days should I help her sell the extra car and then kick her out with enough money to at the very least go stay at an extended stay hotel until she can find a place?

Thanks again for any input.