Not sure if I am reasonable or not. Elderly mum lives with me but is a landlady of a tiny old property which she rents out. There have been numerous issues with tenants over the years; the problem often stems from tenants taking the p*ss. The pattern usually tends to be that the tenant falls into arrears then absconds. Last one owed £4000 and has never been traced, despite my huge efforts to trace them (at mum's request).
The most recent tenant has fallen into arrears (we are talking 8+ months so nothing to do with the current situation with lock-down). It has now come to attention that the tenant has moved out and has sublet (in breach of the tenancy agreement and without discussing it at all with my mum) to relatives and is charging them rent as if the original tenant owned the house. They are aware she does not own it. They are paying more than my mum charges the tenant, who is not passing any of this money to my mum btw.
My mum takes people at face value. The tenant is very plausible and she elicits sympathy from my mum by bringing tales of financial woe. The tenant disclosed that she cannot pay the arrears because she has given her savings to her daughter to help her onto the property ladder. (tenant's FB page shows she has a great lifestyle for someone too poor to pay the rent - she is CF).
My mum cannot see that there is anything wrong with the situation and she does not recognise the term 'tenancy management'. She resents any discussion and takes everything as a personal attack (narc' tendencies - another story another time).
I have no idea if the landlord insurance covers un-authorised sublets or even if she has any insurance.
Am I being unreasonable to think that I don't like other people taking advantage of my mum's benevolence in this way?
Or
Is this really none of my business?