I have a Sun/Moon square. My mum didn't love my dad on a personal level.. she's admitted this to me. She did love his writing and other surface things, and thought he was *good* for her at that point in her life. He is Aqua (Aqua moon). She is Leo (Gemini moon). I wouldn't honestly say he loved her either.. At best it was an intellectual friendship. At worst it was no understanding at all and many arguments. Good thing it didn't last long.. It could've gotten worse. After the divorce they were on fairly 'friendly' terms again, very cold but amicable.My kid nephew has a Sun/Moon square also. His parents (Pisces/Gem and Leo/Gem) ‘seem’ close, but there's something superficial about their relationship. I don’t know this for a fact, but from the vibes they give out.. I don't think it goes very deep.. it's seems to be based on attraction and appearances. It’s almost as if they think someone is filming them and they’re playing parts in a movie, and in a movie they’d *seem* so perfect.. so they keep it going regardless of the cracks deep down.
:edit: Just thought of some other examples. One of my friends is a Sag/Gemini moon. His mum and dad live in different cities and barely speak to each other. They didn't part on bad terms and I'm not 100% sure they are actually divorced.. but they just drifted apart due to his work and they completely ignore each other. It's quite strange. She is an Aquarius, but I don't know his sign.
My bf also has a Sun/Moon square. I don't know whether his parents were in love or not back in the day.. but they have also parted ways.. though they do talk occasionally. It wasn't a bad break up. They're probably closest, in comparison to everyone else mentioned. They actually invite each other to celebrations and dinners etc.. (His mum is Gemini/Libra Moon - Dad is Sagi/Aries moon)