DH's dad died over 25 years ago. In his will he left his half of the house to his adult children, but gave 'liferent' of his half of the house to his wife (or partner, am not sure if they were married), until her death.
She lives in the house with her new husband and adult son.
When she dies, she'll presumably leave her half of the house to one of these family members, let's say it's her son.
What's to stop her son putting the house on the market, selling it, getting all the money in his bank account and never telling my DH and his siblings about it?
I have no idea how law works, especially Scottish law.