played the edge of??
I was thereafter aware of how much time I was working on her drawings, as I played the edge of her very real and remarkable reception of what I was showing her with the fact that my little darling simply wanted to lay claim to a better drawing. It was all in good fun and it wasn't long before I recognized that the collaborations between her artistic awkwardness and my skill resulted in better, far more interesting drawings than anything we ever did individually. Lisa helped me loosen the grip on my all too factual renderings and I helped her tighten her artful lack of dexterity. We were well matched!
I would like to know what does "played the edge of " here mean? Thanks.