Mother Faker

Liv is supposed to go away for the weekend with her 3 best friends. Her 3 kids are staying with her recently-ex husband as ‘one last favour' but her boss, Beckett Langfield, makes her and her friends fly to his house in the Florida Keys instead so they can work on a pitch. Whilst drinking on the beach in the evening the women open up, they're all struggling as single mums. So the idea forms that they'll move into Delia's brownstone in Boston. Her great-aunt left it to her and it's definitely a fixer upper but it's got enough room for the four of them plus their seven kids. Except... except Liv accidentally marries her boss when they're in Vegas and drunk. It helps him out of a kid-hating tight spot that was going to cost his future at the company. He'll pay to help fix up the broken house.
Except... except, his parents announce that they'll stay in his apartment whilst their place is getting done up so Beckett moves in with Liv and her extended family. It's grumpy-sunshine, he kinda falls first but she's always like him just never thought he'd like her back because she's 'plus size' (I honestly have no idea what this means in the context as it's not referred to anywhere except like all women she has hips and boobs....). Ends as expected but good characters and would read books by the author again.