Mark 14:69 “And the servant girl saw him again, and began to say to those who stood by, “This is one of them.”
So, being not convinced by Peter, this same girl affirms his association with Christ. Likely she didn’t think he would overhear her, but at this point it was all he could think about, and was on guard. She may have followed him. But, it is more likely her duties simply brought her to the courtyard.
Heavenly Father, you are the only one who knows what will happen next. You alone can lead us in the right way. Thank you for your Word! It shows us how to live. It shows us what to do. We are enriched by it. In the name of the Lord Jesus Christ I pray and praise you, Amen.