Plot
Daniel Lieberman, Paul Halston-Myers, and Matt Walker grew up together. Now, living in NYC, they ride with Daniel on his way to propose to Erin. Using his key to enter, he comes across a naked man at his fridge and she comes out of the bedroom mostly naked, surprised to see him.
In Poughkeepsie, NY, Carol Walker, Gillian Lieberman, and Helen Halston meet every Mother's Day to commiserate their sons not recognising the day and shutting them out. Gillian mentions swooping in on them but then takes it back. Helen motivates them all to do a road trip to surprise them.
Carol immediately starts tidying up Matt's apartment. Helen loses her nerve and books a hotel room. Gillian tries at Daniel's and gets a room as he doesn't answer. Both Carol and Gillian call to report their progress, but Helen lies that she is staying with Paul. The next morning, Helen shows up at Paul's. When she introduces herself to his other gay roommates, she complains he never came out to her, although she always knew. Gillian also sees Daniel but is visibly resentful of the surprise.
The moms meet up to compare notes. Their talk motivates Helen to move out of the hotel. That night as she preps a meal for Paul's housemates, his boyfriend tells her a lot of his insecurity comes from abandonment issues as, after her divorce, she never had time for him. When Gillian returns to Daniel's he's out, so she enters through an improperly closed window. He's gone out with Alison, a divorced Jewish woman whose number Gillian gave him. He cuts the date short as she triggers his memory of his recent breakup.
At dinner at Paul's, when Helen shares that he'd never come out to her, he says he had with his father years ago, and she gets upset. Once alone, he apologizes, but she gets upset all over again when mentioning his boyfriend's theory that his abandonment issues are because of her. Matt tells Carol he has a work party that night for his magazine, of which he is the art director.
Although not invited, they give Carol a makeover in Erin's salon. Gillian apologizes for having been hard on her. They accompany Helen to the restaurant where she is to have lunch with Paul, and he reveals he was a sperm donor for lesbian friends. Upsetting her again, Gillian and Carol witness it.
Carol crashes Matt's work party while Helen and Gillian plan to go clubbing. She gets drunk with Julia and when he sees her he tries to get her to go home. Instead, she calls the girls to go out. They live it up, getting pizza, going clubbing, and dancing all night.
In the morning, Julia stops by Matt's to leave something of Carol's. When he realises she hasn't returned, he gathers Paul and Daniel and they find their three moms, nursing hangovers in Gillian's hotel room. Afterwards, the three go together to get presents for Paul's sperm baby. In the shop, the truth comes out that all three of their husbands cheated on the same weekend. Helen divorced hers, Gillian forgave hers and Carol didn't know about it.
Then each mama gets closure with her son. Carol tells Matt she is going to focus on herself for a while. Helen pushes Paul into giving her an address, so she coerces one of the mothers to hold the baby. Gillian apologizes to Daniel about Erin, tells him how she'd forgiven his dad for infidelity, and convinces him to go after Erin.
Julia helps Matt to write the 10 things he knows about Carol, which he sends to her with a bouquet of her favorite flowers. She angrily throws out her deceased husband's fishing paraphernalia. Daniel catches Erin's moving van, offering to drive her to LA.
One year later at Gillian's house in Poughkeepsie, before Daniel and a pregnant Erin tie the knot, Carol comes. She's with Matt who is dating Julia, on return from time in Europe after selling her house. Paul is also present with his boyfriend, the lesbian mothers who got his sperm, and their daughter, Helen's granddaughter.
