Signing A Quit Claim Deed After Autism Diagnosis?

Location: Kansas City MO

Hi all. My brother wants me to talk to someone before I sign the quit claim deed for the house my ex wife is about to sell. My ex and I get along really great, and we get a lot of praise from people for how well we coparent. But my family feels that I might have been taken advantage of. I'm pretty sure I have to sign it, but I'm following through with his request.

We divorced three years ago. When she first sat me down to ask for a divorce, she asked if I planned on taking my half. We owned three houses over the course of our marriage and I always paid half the mortgage, even though she always had a vastly higher salary. She warned that if I took my half, she'd have to refinance the house and might have to sell it to move into a less nice neighborhood, adding that she'd be struggling to get by financially even if I didn't take it. My priority in the divorce was disrupting the lives of our sons as little as possible, so I gave her everything.

I didn't get a lawyer. I believed her when she said she'd be struggling and talked like she might have to move. She didn't struggle. She thrived. Numerous international trips, golf cart, lavish nightlife, etc. I was laid off a few months after the divorce. I lost everything and had to move in with my brother. My parents had to help out financially. I pivoted careers and slowly rebuilt my life, but it was absolutely a traumatic experience, and I know my children have to have been affected by seeing their hero fall and live in survival mode. I never, ever imagined I'd be the kind of person to end up homeless or needing assistance.

Here's the autism part. My brother, girlfriend, and therapist all feel I was misled. I was diagnosed with autism a year ago; I'd started dating my girlfriend who works with autistic children and their families, and she felt I needed to test for it. The biggest takeaway from my test results was that I'm "susceptible to coercion." I grew up with OCD (developed when I was nine) and didn't get help until my early 20's. After I became a father I was diagnosed with ADHD. That's my background. If it matters.

Forgot to add: She's about to sell the house for a new one she and her fiance had built. They're very, very well off. She wants me to sign a quit claim deed this week.

I love my ex platonically. We are good friends and still do holidays and soccer games and everything else together. So I'm terrified of rocking the boat. I don't want to ruin the coparenting relationship we have. But in this economy, with my wires crossed the way they are, I didn't stand a chance to build a stable life for my boys without that money. Before signing this, they want me to make absolutely sure there's nothing I can do.

Thanks for taking the time to read, and for any advice you can provide.