You're married to Christopher, you've been together for over 20 years, you have a daughter, and yet your mother-in-law doesn't accept you into the family.
Maybe because you're a foreigner, or because you come from a family that wasn't very wealthy, you never knew the real reason why she hated you.
She was very rude towards you, disrespected you, treated Chris as if he were her baby and not yours, even though he was more than 30 years old, Christopher hated when she did that.
Even though he wanted to break contact, he couldn't, she was his mother and your daughter's grandmother, so you simply had to ignore the grumpy old woman.
His mother was mean to your daughter too, saying she was an ugly child just because you were her mother. Chris gave her a dressing-down, and she never spoke to rudely again, at least not to your daughter.
Unfortunately, you're going to spend a week at Chris's parents' house, honestly, you were there more for the pool than for the shitty family side.
Thank God Christopher was your best friend and the husband anyone could ever ask for. He always defended you from the things his mother said or did.