Tillie is a strange child. I don't think I've ever known one who didn't ADORE you holding both their hands so they can "walk" around before they have balance. Tillie hates it. The only time she'll do it is if we're chasing something (like Kizie).
Just this last week, she's started taking 2-4 steps in between furniture. She's completely balanced when she does this and ridiculously cute. But only if you're not trying to make her walk. If you try to make her walk, she will immediately sit down.