I think the constant shuffle that happens is to keep us off balance because they know darn well that at some point we may become involved with someone else, their shuffle makes it pretty hard to plan for things weeks down the road KWIM?
OK, just so you don't get to thinking your W is very crazy I got a little story for you.
I came home from work yesterday to find lots of cars in my driveway and street, I wonder WTH is going on as STBX is visiting the kids. Get this, she is holding a baby shower at my house. I came in saw what was happening and threw the lot of them out. Tonight we had a little chat, I told her that she shall never set foot in my house again, I told her we are not friends and we are getting D. This shook her badly, I guess I kinda saw what I must have looked like when she bombed me. She left in tears.
Things are gonna go downhill soon but thats another choice she will make.