What was the relationship between Annas and Peter?
After Pentecost, Annas was on the council that questioned Peter and John. Peter answered that they could not keep from speaking about what they had seen and heard. Acts 4:5-7, 19-20
What the Bible says
Acts 4:6
And Annas the high priest, and Caiphas, and John, and Alexander, and as many as were of the kindred of the high priest.
Acts 4:7
And setting them in the midst, they asked: By what power, or by what name, have you done this?
Acts 4:20
For we cannot but speak the things which we have seen and heard.
Douay-Rheims Bible (Challoner revision), public domain.