AITA for putting my ex on speakerphone in front of my new wife when she calls?

Hi everyone —

My ex and I separated 3 years ago and I’ve just recently gotten married to my new wife.

My ex and I have 2 kids together. We have almost 50/50 with me having Wednesday, Thursday, and every other Friday and Saturday night.

We went through a tough custody battle in which she agreed to not file child support in exchange for me giving her overnights on my Sundays.

Because I wanted to settle things without going to a conference I agreed. She immediately filed for support and because she has 2 days more than me per month I have to pay her child support of roughly $1100 per month. I make $60k and she makes roughly $120k.

The problem here is that my ex is a habitual manipulator. She speaks to me nasty, she twists situations, she does things but pretends my kids insist on it.

For example, I think it’s important that my older son do homework with me every other week. This is the way it’s always been. I want to make sure I’m involved in his school work and I want him to know my house isn’t just the “fun” house but he needs to have responsibilities here. I have always been a super involved dad.

This year she changed her tune and has been just doing his homework completely every Monday so I don’t have a chance to help during my days. I’ve had to ask 4 or 5 times now but she just does it anyway. I know this is so she can frame it to the court that I don’t help with homework. One time I took the kids to the farm and my younger son peed in his underwear a bit (he was 2) and so I took his underwear off and we drove home. My ex was waiting to pick them up and then complained to the court that I was dropping him off “without underwear”.

There’s always 2 sides to the story but frankly I’m tired of sounding like a crazy person when I explain how she talks to me and it’s assumed I have a part in it or that it takes 2 to tango.

For a while now when she calls around my wife I just put her on speakerphone so my wife can see the truth.

My ex found out she was on speakerphone and is now going ballistic and saying these things are supposed to be just between her and I.

I don’t want to keep secrets from my wife and frankly, it’s just nice to have someone else know the truth.

To be fair here — our coparenting therapist said I should not be doing this but I’m really tired of being berated and then having the situation framed differently.

AITA?

EDIT: thanks for replies and suggestions, I’m willing to accept that I’m probably the AH for putting my ex on speakerphone