Hey, not a "failure"--youou reacted to years of abuse as you always have. The fight-or-flight response served our species for millions of years. The rest of our brains have to be trained to overcome those responses.
And even though you spent the weekend in a tailspin, you brought your problem here, where we were all able to talk it out and help you put it in its proper perspective. So don't beat yourself up.
Not to defend his lawyer (who truly may be a slime bucket), but do you think he's giving his lawyer the truth? You can bet he spun it to him, and I would love to be a fly on the wall when they chat after you present all your evidence, calmly and clearly.
He's the one who will be wasting money--his or his mom's. Not your problem. Sorry you have to be inconvenienced, but the best weapon is the truth. Calmly and clearly stated, as many times as necessary.
I think you'll be just FINE.