Good for you for hanging up - yes the way she is acting is not the W you know... we have all experienced that for sure.
I also agree with the fact that every sich is different and every W is different, I know my W felt I was being very cold in the beginning. Despite being in the A, she had been talking to her IC about leaving vs. coming back and me being cold to her only encouraged the leaving side.
I think there's a fine line we need to balance between boundaries, self growth, but also showing a caring, loving and kind attitude towards them - if they are receptive but without feeding too much that would lead to cake eating.
It's not easy, what I'd suggest is writing down goals, or playing through scenarios so that you are prepared as spur of the moment we tend to react with our emotions.
Me: 40 W: 45 T: 13, M: 11 1 D: 9
Suspect A 6/15 ILBINILWY 8/15, and 3/16 EA/PA Discovered 3/16 EA admitted 3/16 W Moved out 4/16 W opens R talk and says A over 1/17