So I think she maybe willing to be cooperative but again who knows.
Ultimately the law is the law so whether or not she's willing to be cooperative doesn't matter. Just make sure you know what you're entitled to and if she's not willing to concede that cooperatively, than fight for it. DO NOT give up half her pension.
It sounds like you may make more relative to her, so keep in mind spousal maintenance may be a factor. But perhaps if she's eager to go off with OM and doesn't want to engage an L she might waive it.
Me:39 Ex-W:37 M:7 T: 9 S:6 D:3 BD/IHS/Confirm EA/PA: Feb '20 OM1 affair ends: May '20 W/OM2 & moves out: June-July '20 W files for D: Jul20 OM2 confirmed: 9/2020 Divorced: May '21