DD1 has a friend who lives in the same street as us, children don't tend to play out in our street as it's not a road that's suitable. When they were younger we arranged playdates, which would be after school until about 6 and include tea with Mum's collecting. They are old enough now to go home by them by themselves and play together after school a lot now usually at our house. Dd's friend is lovely, but a very fussy eater and won't eat a lot of meals that my dc's have regularly.
As she comes to play a couple of times a week I'd prefer it if we could change things so it's more of a play and then go home for tea. How do I say this to her Mum without giving offence, she can be a bit tricky. When they come out of school asking to play there have been times that I've said that I haven't got enough food. Friends Mum then offers to have them at her house, but the girls both prefer to come here. I'm happy to have her here to play, but the mealtimes are a bit painful. What do you say?