Bit awkward.
I have a colleague who is also a friend. He has a DD who is 7, but is quite young for her age. She doesn't have very many friends that I can tell, possibly because we live in a very 'community' orientated place (TigerMumCentral) and her parents aren't all that sociable with the crowd.
Their DD gets on really well with my DD, which is fine, but my DD is 3. We see them a fair bit, and drive their DD home from school etc., so they play for an hour or so most days. Their DD does get annoyed if my DD wants to play with friends of her wn age, and I've been patient and understanding, but firm, when I explain that DD is only 3 and is allowed to play with other 3 year olds. We live in a place where there are lots of older girls, all willing to play with her.
Her parents were getting concerned that she was being too clingy with them, and asked if she could have a sleepover here to see how she got on. She did, she and DD were fine.
Now they want my DD to sleep over there.
I explained that, no, she's 3, not dry at night, and sleepovers are a long way off in my opinion. They don't seem to understand, I guess seeing that their DD loves her and would love another sleepover. They say they'll deal with the sleeplessness / pull-ups etc., but I just don't think she's ready, and frankly I see no need for it.
How to deal with this?