Cohabitating

My STBX has been cohabitating w her AP (they have a child together) and I’ve been ordered to pay her tons of maintenance. The divorce obviously got stayed over a year due to her baby. Each month that piles up is more than a mortgage payment. I had been paying monthly until I discovered she was cohabitating. At this point I’ve been struggling to get my attorney to send her discovery and interrogatories (so much so I gave him until the end of the day or he’s fired).

Is her attorney at all obligated to make the court aware of this? They’ve been living together over a year at least. Is she obligated?

Here’s the thing, she got the court to allow her to keep her address hidden, and she’s unlisted everywhere online. I somehow luckily and legally obtained voting records to prove both her and the AP voted from the same address. This is totally nefarious, she’s already gotten over her gross pay during the marriage back in maintenance and keeps asking for more. Her original FDS shows she lives alone and makes $1250/month and had $2850 of expenses and I’ve been orders to pay her $1600 month. 6 year marriage, no kids. She makes $25k and I make $50.