I would say yes but with so many bodies in the home things could go south really fast. Think about another option first. My opinion.
Run, run away from that! The only good thing that could happen is you could have an **** one night. There are thousands of things that could go wrong so stay away!
So living with her and not being married to her would be like unpaid prostitution. If you want to commit, then marry her because otherwise you are both prostituting yourselves.