I wince when I hear of people complaining about their spouses to their parents. Often times, the couple works through the issue, but the parents only hear about the negatives, which absolutely impacts how they view their DIL/SIL.
It's unfair to everyone, imo.
Who wants to have dinner with people who've heard private marital struggles with your partner? Or worse, has no clue that intimate marriage issues have been shared with the people who are at their dinner table?
There's a level of betrayal involved, I feel. If you're struggling in your marriage, you need to sort it with your spouse, perhaps with the assistance of a therapist (be it couples or individual), not be involving family members. You may forgive your partner, but there's zero guarantee your parents will. Parents and family members aren't neutral third parties.