How can I set a better example for my children after they witnessed my siblings destroy the family we grew up in?

There are five siblings in the family. Out of those I am the middle one who never moved out of the state we (as well as our parents) were born and raised. Each of us made our own decisions, I chose to marry and raise my boys here with no regrets. After our dad passed away, mom decided to sell her home and moved ten miles down the road from me and my family. She was very independent and voluntarily gave up her drivers license at 80, and even chose the assisted living facility she eventually moved into in 2010. During this time my siblings visited her when they could and were helpful for the most part. She and dad had their will and POA drawn with their attorney 2 years prior to dads death, so legally everything was cut and dry, or so I thought...... I was designated as her Health POA. Then, due to personal reasons, the sibling who was assigned to her finances asked me to take those responsibilities as well. Not one sibling objected to this change. I had the experience from my job as an accountant before I married and started a family. In an effort to prevent the possibility of mistrust, I kept meticulous physical records of each and every bank, credit card and debit card transaction. I also offered to show everything to my siblings when there were in town to visit mom, no one ever accepted my offer. Fast forward to 7/2015 when a sibling offers to take mom on a weeks vacation to visit my oldest siblings. When she hadn't returned 7 days later,(l had gone to her ALH to help her unpack and hear about her trip) I asked the housekeeping staff if they had seen her and was referred to the Director. She handed me a faxed document that stated mom would not be coming back and that she (mom) had become a resident of TN, Including a TN originated POA. This out of state POA eliminated me and my youngest sibling from all legal documents and instated only those siblings who she had visited. They had cancelled her credit/debit cards, closed her bank accounts and took all of her money. They had taken her to an attorney and had mom sign everything over to them. Two weeks later they filed for conservatorship based on her incompetency in TN Court. That was when we received the first of few trickles of information, in the form of that legal notice. Our phone calls went to voice mails and never returned, emails came back as undeliverable and it was almost two weeks before we were able to find out where she was living. We had to practically beg a nephew in TN to help us and he eventually did by taking his cellphone to our mom so that we could speak to her...for 5 minutes. We hired a TN attorney that specializes in Elder/Family law, he has given us excellent advice and has been very kind. As the court date is rapidly approaching, we receive a list from moms appointed attorney with requests for 12 Discovery items including all moms financial, medical and tax documents; this isn't a problem because along with those I have over 400 emails between me and them as well as audio and video records of their past deceptions to both parents. I have complete confidence in the ability to beat them in court, however, in my heart the right thing to do is remove my objection to their conservatorship due to the embarrassment and humiliation it will cause our mom. It has been 338 days since I last saw her and 249 days since we last spoke (I cried when I heard her voice, it upset mom and I was threaten with a restraining order by those siblings) All of this has become my absolute worst nightmare! Stress-headaches and sleepless nights have become the new normal for me, but I mostly worry about the effect this has had on my children and their views of family discord. Above all, I was never told why they decided to do this. Mom was happy, healthy and was living in her home state with her friends, grandchildren and great-grandchildren. There are no reasonable explanations for their actions