Merry Me Darling by Lilian T. James

Madison woke up thinking it would be a piece of cake to meet Garrett’s mother. She made him like her, after all. But the closer they get to Garrett’s childhood home, the more doubt starts to creep in.
She knows as well as anyone that mothers can be protective of their children. And as a divorced, single mother, the only thing Madison has to offer Garrett is her heart. And she’s not sure if that’ll be enough for the woman who raised him.
Which could pose a problem, given the Christmas gift she has hidden in her suitcase for him.