The situation is a little complicated. Please bear with me as I try to explain it as best as I can. And please no judgement for our "alternative lifestyle."

Background:

I live in the state of Pennsylvania (particularly Southwestern PA). I am engaged to someone I've been with for 2.5 years. We are polyamorous (we are open to dating multiple people at the same time and it is not considered cheating unless boundaries are broken). My fiancé (call him George) has been dating another woman (call her Heather) for 8 years now (6 years longer than me). We get along...for the most part.

About 1.5 years ago, we moved in together. All three of us. Into an apartment I leased on my own. (They were added to the lease agreement, but weren't responsible for payment or rent, etc.) The apartment started off clean and then became a horrible mess. Mainly due to Heather's unwillingness to clean and cook and take care of her parts such as taking the dogs out on a regular basis and cleaning up their messes. I tried to clean up after her, as did George, but we both worked full time jobs (both of which had mandatory overtime) while she stayed at home all day and did nothing but sit behind her computer screen so it was nearly impossible to keep up.

I bought a house at the end of July. (July 31st to be exact.) The house's deed and mortgage are in my name only. Not George's. Not Heather's. I had told her, and made her verbally agree with me in front of our shared partner, that she would take better care of the house I bought. That she would get a job. That she would start therapy. She agreed.

She has refused to apply for jobs, will not cook or clean up after herself or the dogs, thinks her room stinking so bad she has to keep her door closed at all times so the smell doesn't drift out is okay, and has refused to start therapy because it's "too much."

I want to set down a formal, written rental contract with her as a last resort before I'm forced to kick her out/evict her for her abhorrent behavior, but I'm not sure what is appropriate to add into it. She doesn't pay rent (how can she with no job?) and doesn't really contribute to the household the way she promised.

I was thinking of adding clauses like "a well-maintained space will be kept, no potent odors allowed, dishes you have created will be cleaned by you, the dogs will be taken out on a regular basis" etc. But I'm not sure if that's even legal in the state of PA.

If anyone can help give me some advice of what I can and cannot put into the agreement and how to make it a legal, binding contract, that would be fantastic. George and I don't want to kick her out, but we are both at our wit's end and because it's my house legally, he left it up to me on what I wanted to do.