I need an advise... My husband and I are in the middle of divorce. He took our son for holidays last week, but didn’t returned him to me ( he said it was too late), and took him straight to his mother’s...today I messaged her saying I was coming to pick my son up, however she replied that she is sorting out his school uniform out ( she offered to pay for), and they are too busy...she then texted me saying “ if you can’t wait to see your son , you can come tomorrow afternoon, but not before we are done”...what????....what do I reply? I am literally lost for words...I don’t want to be rude, but..how do I build the boundaries?