How would you deal with this, or to make it accurate to AIBU.. am I being unreasonable asking?
If a member of your partners family stayed at your house and something went missing after they left, you noticed a day or two after their visit; would you ask them if they had seen it, or would you come out and accuse them of taking the item? (Your gut instinct tells you it was taken, not easily lost.) would you hide anything they may take a fancy to in future?
It is not something sentimental or hugely expensive although, something I had bought myself as a "treat."
I feel sad that this person could steal from me ☹️