As the title says, I found out yesterday that my DM and DS forged my name on legal documents to transfer ownership of my car to DS. I'm wondering how others would handle this on a personal level. For context, there has always been a scapegoat/golden child dynamic in my family and DM has a history of impersonating me and forging my signature, but this is the first time there is a paper trail. DS is fully on board with this dynamic and doesn't treat me with even the most basic amount of respect. We are both in our late 30s.
A few years ago I unexpectedly moved to the UK from my home country for a new job. I thought it would be easier to sell my car if it was fully paid off so I left it in my parents' garage and made the last few payments after moving. It was agreed that they would send me the title document (sent to their address) so that I could start the process of selling it and they would facilitate viewings.
This is when the trouble started. DM refused to give me the title, pretending that she didn't know where it was, or that she wasn't aware she had it. This was always followed by a comment about how DS might need a car one day. DF is very passive and refused to look for the paperwork.
In Feb I started hearing about how my DS's car was beyond repair. My family visited the UK two weeks ago for my wedding but did not bring the paperwork. While visiting DM said DS wanted to buy my car and that she had a family friend (with no car knowledge) "value" it for a price that would barely buy you a wreck (the car has 40,000 miles on it). I said if DS wants to buy the car we can discuss it as I want to sell it in general, but not at that price. This was in front of my husband and another family member.
After the wedding DH and I took 4 days to go away to a rural part of the UK. On Thursday evening DS messaged to ask about a few features in the car. On Friday she suggested an initial price, then a lower price, then said this was probably going to drop more after she had it "inspected". I told her the signal was very poor where we were and the hotel wifi was not working so I would get back to her on Monday when I was home and had time to do some research. She said that was fine.
Yesterday DS messaged to say she was going to transfer the car into her name and when I asked how she could do that when I hadn't sold it to her, she said DM forged my signature on a bill of sale. She then started dictating that she would only be paying me in instalments, that she put a very low value on the sale documents to avoid taxes, etc. I told her that I was not okay with it, we had not agreed a price, and that they are not to forge my signature on anything (this is all in writing). They went through with it anyway and filed all the legal paperwork and she has taken possession of the car. When I spoke to DF he agreed that while what they did was illegal, this was "urgent" and I should have dealt with it while away with my husband.
I guess I'm just asking for how other people would handle this if they were in my position. Like I said above, this is a long standing pattern and follows a lot of poor behaviour at my wedding. I'm just exhausted with the whole situation.