The other thing I just thought of, is for mummy to leave something of hers behind with the little one. I know he is small but she could say something on the lines of "please look after this for mummy until I get back" then make a big thing out of retrieving whatever it is when she returns, encouraging the little one to find it for her. If she uses the same thing a few times he will begin to grasp that he is looking after something for mummy and she will get it back when she returns.
Oh and she should never sneak out without a (not prolonged) goodbye, which is far too confusing and upsetting for the little one.
I suppose I shouldn’t have been annoyed, but…
Engagement Party and then Hen Party

