Birth mom expenses

What do you consider "reasonable" Bmom expenses?? We are working with a wonderful agency who has been trying to get in touch with our Bmom for about a week to discuss any expenses she may have. When they finally spoke with her, she requested we pay her $2100/month rent for the last four months of her pregnancy because she might not be able to work as much. We - along with the agency - were shocked! When we were matched she mentioned to our rep she wanted some medical co-play's covered (we planned on paying them anyway) and possibly some help because she was moving after the adoption was finalized (we never discussed this). After speaking with our agency, our attorney, local child services, our home study writer, other adoptive couples and Catholic Social Services, everyone agrees this is either too much money, high risk or just outright ridiculous to ask. While we live in a state with a high cost of living, the amount requested is more than my mortgage, camper payment and one car payment, and exceeds most couples total monthly expenses! Also, our state legislature makes no provisions for paying living expenses, only medical, legal and reasonable services all directly related to the pregnancy or birth. Sadly, we have not heard from her since we had to tell her no, nor will she get in contact with us to discuss what we are willing to pay. If she doesn't get the money from us I don't know what the likelihood is she will get it from anyone else. And even if she found someone who was willing to pay that, law does not allow it. When the baby is born, she still will need help with the rent assuming she does not move like she is planning. If she wasn't pregnant, she still needs the money. None of it makes sense to us... Any thought, advice, or your experience is greatly appreciated!!