My child minder, who I trusted totally, never let me beyond the hallway - but the main children's playroom was just off the hallway. She said it was 'cos she didn't have permission from other parents or something like that.
She also had quite a few children - but that was becasue her mum and MIL worked there full time, so she was able to be registered for more kids. SHe also had/has an enrormous house and enormous garden.
Part of the reason I could trust her so implicityl was a) ds was alwys happy to go there and b) she is our neighborur, literally the hiouse next door, so that we can see that all the kids always go in and out happily - and we can also see them when they are playing in the back garden.
Ds is now 6 and in Primnary 2, so it is 18 months since he was last there - but he still talks happily about his time with her, and desparately wants to play with her two boys (one of whom is only a few years older than ds, but the other is now a young man - but who had a real soft spot for ds)
SO oyuo can't just automtcially distrust someone who doesn't let you in further than the hall. But this case doesn sound strange - surely the older "speaking" kids would have made commnets that should have rung alarm bells with their parents?