Sometimes, just the act of venting is helpful. Counseling provides a safe haven for precisely that kind of free-ranging release: You can say things in the therapist's office, with the therapist present, that would be incendiary or hurtful in your living room.
Especially where financial matters are concerned, when it comes to dissolving a marriage, any dissembling at all is strictly against the law - on penalty of perjury. You need to disclose fully and factually, which is precisely what the discovery process is all about.