not a legal beagle let alone a scottish legal beagle but the house put in his name thing is a little worrying.....if it was put solely in his name without any kind of caveat, essentially she gave him the house.....now that appears a bit iffy...for the holder of a POA to receive such a valuable gift from the donor of the POA...
If she gave the house to her son, do we know why? I believe that is scots law, children have certain inheritance entitlements and if she gave away the house to avoid this, then maybe they have a claim. I will be interested to see the comments of the AB experts.