This is about my mum.
I have had a few threads wondering what is going on with her - she is very religious but also very obsessive, she's had OCD since before I was born. It is all tied up and tangled up in knots.
There have been a lot of things where she has been overscrupulous and it's affecting our relationships with her badly - now she has started doing it with ds1.
Today they went to the beach, with ds2 and my dad. Ds picked up a pebble (no larger than an inch) and put it in his pocket. They went back to my parents' house where he made a small bonfire with my dad and burned it, so it got blackened, and then wanted to bring it home.
My mum said no, she was going to put it back as it belonged to the council 
He really wanted it and she kept saying no. He told me this when he got back and I rang her to ask what happened.
She confirmed it, and said she is going to clean it first then take it back.
I said how do you know it's the council's and not just washed up from somewhere, she said she RANG them to ask because she saw some children selling hand painted pebbles one day and bought some and then felt like she should not have done 
so she rang to check and apparently it was against the law to take pebbles, or to sell them, luckily the children were no longer there or I dread to think.
She is going nuts. I have told her this, we have had calm discussion, she insists she is following the letter of the law.
My dad just goes along with it. They are both lovely people but this is insane.
What sort of help can I try and get for her. I don't want her going slowly mad.