For the past 7 years I have taken my DD’s best friend almost everywhere with us - meals out, day trips, theme parks, spa weekends, week long holiday cottages, trips to Ireland (we’re England).
In addition to this there’s the usual stuff after school, sleepovers, etc,
We have other friend too now and again, but it’s mainly BF.
I arrange all this pretty much directly with her mum as both girls (now both 18) are SEN, so once they plan it, I deal with mum. She always asks how much money BF will need, and I always say pocket money for sweets & ice cream - I always pay for everything else because they don’t seem to have much money. They don’t drive either so it’s an hour round trip for each pick up/drop off.
Not once in that time has my DD crossed the threshold into their house. She’s never been invited for tea, or just to watch a movie. Nothing.
AIBU to expect something, nothing fancy or that’ll cost anything, back in return ?