Could you get along with ex wife/husband?

So parents divorced like over 10 years ago and during their marriage everything was insane constant fighting and screaming because growing up with my brainwashed mom who wouldn't even let us kids listen to different music. But now after they have divorced like now after 12 years have gone by they hang out every weekend. My mom is mostly a lazy bitch but I don't understand how she can be with him all the time.
Could you get along with ex wife/husband?
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