I agree with Playfelt .... your issue with them is about respect and being valued if you ADDRESS that and how their behaviour affected you and let them clearly know that reentering the relationship THIS is what is expected it might work out GREAT!

However while I always like to expect the BEST of people I also tend to plan and prepare for the WORST out of self preservation ... so personally I would take a big ole 'two week security deposit' from them like first and last and make sure it is clear that it is non refundable and can only be applied to the last two weeks of service provided a MONTHS notice is given .... so that way they have to put their MONEY where their mouth is when they apologize for their treatment of you in the past so you cannot be burned again