Name changes for this.
PIL very kindly look after DS (10 months old) once a week for us while we are work. Upon collection they give me a run down of the days events etc etc and casually mention... 'oh and Mary took him out for a walk'. Turns out Mary took him out by herself while PIL's financial advisor came for a meeting.
Mary is a very close long-standing friend of MIL who I've met a handful of times. Seems like an absolutely lovely women, but I don't know her overly well.
AIBU to be a bit uneasy that PIL sent DS off out alone with someone with neither of them present? PIL have known the woman for years, so I'm sure they was confident he was in safe hands - however I'm just not sure I feel comfortable with the idea of them sending him off with other people? I'd get it if there had been some sort of emergency, but it wasn't. I have always said if there is ever an issue with looking after him or a day they can't do I will very happily make other arrangements and would never want to put them out.
Am I being a bit precious or justifiably uneasy?