With respect to your child's biological mother's rights and finalization, there is no relationship. Once she has consented and any post-consent termination period has closed, consent is irrevocable and final. She cannot 'take the child back'. Finalization from that point on depends on a) whether consent was legally given/rights legally terminated and b) whether you've complied with post-placement supervision. Legally, once that 10 day window closed, her relationship to your child is 'as a stranger'.
I see from your profile you're in Georgia, here's the relavent code:
http://www.legis.state.ga.us/cgi-bin...pl?code=19-8-9
19-8-9.
(a) In those cases where the legal mother of the child being placed for adoption has herself previously adopted such child, said adoptive mother shall execute, in lieu of the affidavit specified in subsection (g) of Code Section 19-8-4, 19-8-5, 19-8-6, or 19-8-7, an affidavit meeting the requirements of subsection (i) of Code Section 19-8-26.
(b) A person signing a surrender pursuant to Code Section 19-8-4, 19-8-5, 19-8-6, or 19-8-7 shall have the right to withdraw the surrender by written notice delivered in person or mailed by registered mail or statutory overnight delivery within ten days after signing; and the surrender document shall not be valid unless it so states. The ten days shall be counted consecutively beginning with the day immediately following the date the surrender is executed, however, if the tenth day falls on a Saturday, Sunday, or legal holiday then the last day on which the surrender may be withdrawn shall be the next day that is not a Saturday, Sunday, or legal holiday. After ten days, a surrender may not be withdrawn. The notice of withdrawal of surrender shall be delivered in person or mailed by registered mail or statutory overnight delivery to the address designated in the surrender document.
I'd suggest that you work now to set boundaries with your child's biological mother so you may preserve this relationship for their future - for example, make the boundary that if either of you yells, uses profanity or threats, then the encounter will be ended. After X days, you'll talk about it. If it continues beyond X contacts, you won't take phone calls any longer and communication will proceed via mail only - to keep you all from getting too upset over this. The goal is to preserve the relationship in a healthy way - not punish for behavior.
It may not be a bad idea to establish a third party intermediary - counselor, religious leader, etc who can work with you all on this.
HTH, best of luck.
Regina