Dusek: "Do you remember any "further contact" that night?" BVD: "I can't remember, its been a long time, I've been through a lot. "
If her daughter had disappeared that night, and she had no idea what had happened to her, BvD would've re-lived (thought about) every minute of that evening a thousand times. "I can't remember" doesn't pass the sniff test.
Just to be clear, when Brenda said she didn't remember any "further contact" she was referring to the first night at Dad's, Jan. 25th. That was one week before Danielle disappeared. Your point is still valid, a perfect example of selective memory.