odds on tpr?

Not sure if I'm on the right thread because I'm still trying to get myself around what's going on here. But I have had a child since he was 25 days all the mother gave me guardianship because she did not want him. He is almost 6 years old and I have a TTR coming up in one month. There is another woman who has her seven-year-old who's had her six years and there's another woman who is her has her 10 year old and she has adopted her already after I told the mother a year ago. I was going to take her for tpr then she tried to act like she wanted to see him and wanted to know him, but he doesn't even know. I'm not his mother. Is there a chance that after almost 6 years the judge would not tpr and give this child back to a complete stranger? Who has three children one who's been adopted into who I've been living with other women their whole lives.