From my understanding, as it was explained to me:
A recovery contract is what SHE is going to do to make sure she stays in recovery every day. It's not your responsibility to enforce it but if you notice that she isn't sticking to it, it may give you an idea that there is trouble on the wind.
Some examples of the items on my best friends recovery contract were/are:
1. I will set an alarm for x oclock and get out of bed every day.
2. I will make my bed every day as soon as I get up.
3. I will attend x number of meetings per week.
4. I will find a sponsor by x date.
5. I will walk the dog daily.
Her rehab should really be the group helping her with this. Her recovery is hers to own.
Have you written out your personal boundaries and the consequences for violating them yet? That's YOUR responsibility.