2 birthparents, a guardian, and adoptive parents
Here is scenario: Elderly relative has guardianship, have been raising 5 year-old for the last 3 years, convinces birthparents who are in and out of jail that adoption is best long-term plan for child, finds those parents (in this case, family friends), and birthparents relinquish, does the guardian from that moment -- of relinquishment -- lose her guardianship rights, or are they also in that 6-month "suspended state" similar to the birthparents custody rights. Guardian in question wants to make sure that if adoption didn't work out, which is unlikely but always a possibility, child would be returned to her. Child has not been a CPS case.