I agree, it sounds like she was 1. trying to make you comfortable by cracking a joke; and 2. admitting that sometimes she might talk a little too much!

My T has said things like that, too--and often, it was true, he was talking and so I didn't. It was a lost moment for us. It wasn't the end of the world, just a missed connection. When we shut down, we are disconnected. I think your T, in saying that, was trying to reconnect to you.