S.E.
She needs a plan. Normally I would say that a week before birth would not be a good time to make life changing decisions, but afterward there will be no time to figure out anything.
The plan should include how she plans to get independent. Whether that happens in one month or five years is up to you. Does she plan to get a job? Does she need you to babysit? Is she planning to go back to school? For what degree (2 yr or 4 yr plan)?
She should be clear what role the father plans to play in the life of the child and your daughter. That includes economic, emotional, and physical support. If there is no plan on what his role is, do not let him move in. That is just him freeloading in your home, which is not healthy for anyone (including him).
Lastly you should be clear on what you expect from those living in your house. There is going to be some flexibility in the plan, children make that necessary, but you need to be blunt on what you will not accept in your house.