Open adoption in the months after birth

What advice do you have for birth mom involvement in the weeks following birth? Our birth mom is a close friend, and has mentioned several times that she would like to watch or stay with the baby during her medical leave (c-section) after birth, so that I can go to work if I need to. I'm taking maternity leave, but she insists that her caring for him is an option I should consider. She assures me that she isn't changing her mind, and that she just wants to help (I believe her). However, something tells me that her having any kind of care-giving roll in those first months after she's made her final decision to give the child to us is a very bad idea - for the sake of her emotional health and ours. Am I entirely wrong in that? We do have some post-trauma from failed adoption and a horrible foster care experience, so I'm not saying I'm the best person to make this decision. I do care about her emotional health above all at this point, but I also worry about my ability to attach as mommy - I know naturally I will be inclined to take a back-seat if she's around a lot in the beginning and that's not a good way for me to form a healthy attachment to the baby. Edit to clarify: I support her uncensored involvement, but I want what will aid best in a smooth transition. I'm just having trouble deciphering between thoughts that arise from wanting to protect everyone's well-being and those that arise from fear of loss.Advice?