We have guests today for lunch. Whilst it will be nice to see them, from past experience with these guests, they will not want to leave, and will sit around looong after the conversation has dried up and we will need to drop hints that it's getting late. We have a toddler who will need tea by 6 and bathing at 7pm, and we have our grocery delivery on Sunday nights, organise stuff for the week ahead, plus I like to get into my pyjamas by 7.30 In the past I've used toddlers tea as an excuse but they just say "oh we don't mind" and then offer to help!
Any ideas for how we can get rid of them without telling them to F off?! 
