Funny, something similar happened to me the other day. S10's childminder came to see me to drop some stuff off S10 had left behind. We had a chat for a bit. Next morning the childminder ran out to the car to let me know that the Ex wanted to 'come round' for a chat as she got wind that the child minder and I had been speaking because 'NDY doesn't talk to anybody about this'.
She'll be disappointed as all we discussed was me securing a place for S10 and what I can do to stabilise his life but it just goes to show they still want to know what we are up to.
Me:43 Her:42 M:14 S:9 EA started 2014/03 (or there abouts) PA started 2014/05/30 BD:2014/11/05 I left 2015/10/01 I returned 2015/05/02 She left 2015/06/10 OM still on the go.