Dear Mary: how do I hide my pregnancy from my boozy friends?

Q. We love having friends to stay at our house in Cornwall. One particular guest has the habit of arriving with the contents of her fridge, which she crams into mine. This can range from a two litre bottle of milk with enough left in it for a cup of tea, to a pot of half-eaten hummus which has had its lid replaced by a piece of crumpled foil, to a half-eaten pack of blueberries which are going mouldy. My fridge is already full with the meals I have planned and I simply don’t want her unhygienic produce. How can I stop her doing this?

– Name and address withheld

A. Many of us are hard-wired not to waste food which is still within its use-by date. Those who bring such ‘contributions’ have not thought through how unwelcome the offerings will be. Bring such guests to their senses by setting up a table outside the house with a notice advertising ‘Free unwanted food.