Prenuptial Agreement - postnup after infidelity

I publish illustrative scenarios prepared by my practice. All participants and conversations are fictional. The fictional posts are not posts by real users, accounts of client experiences, or reports of actual results.
Illustrative scenario prepared by my practice.
For informational purposes only. This is not legal advice. Laws vary by jurisdiction. Consult a qualified attorney for advice specific to your situation.
Hypothetical question

I've been trying to resolve this on my own but I'm stuck.

postnup after infidelity. I've been dealing with this for about 13 weeks now and the situation isn't improving.

I have already tried to resolve this directly but the other party is not cooperating.

What are my legal options here? Is it worth pursuing?

Illustrative response

I've dealt with this before.

The thing that gets people is filing with the appropriate government agency. I'd recommend gathering evidence first instead.