Minerva held Draco's hand the whole way as they followed their mother down the alley. The store where the meeting was being held was just around the corner, and before they turned said-corner, she noticed Draco turning back, as if he was making sure they weren't being followed. Either it was this, or to make sure that no one was advancing upon his twin. Maybe it was a bit of both. 

"What is it?", Minerva asked him, as they continued to keep up with Narcissa. Just as they made it to door of their destination, she came to notice that other Death Eaters were present for the initiation. Minerva almost had the instinct to shrink into Draco's arms to protect her, but she kept herself on her feet, standing tall, almost in a way to look forward for the task given. However, internally, she didn't want to do it, but they didn't exactly have another choice on the matter; it is what it is.