I know this is probably a common topic. For me, I’m not sure if it’s a “trope” or just totally misinformed writing, but it’s how many authors approach alcoholism. Some examples are Girl on the Train and The House Across the Lake, among HUNDREDS. If anyone else here has struggled with alcoholism, you know it’s not just "i woke up after downing an entire bottle of whiskey but was able to shower, down a cup of coffee, and solve a murder. "
The superficial trope of the big happy family where whatever happens, the parents’ love for each other is never even challenged by mistakes, misunderstandings, third parties, boredom, financial issues, etc. They still adore each other after decades, so much so that they are making out in front of the kids, or they are hiding from them for this purpose, hahaha, so very naughty. OR, if there is any challenge, it’s solved ridicoulosly easily within one week between them.