If you want to talk about the common usage of heaven then you will not be learning anything of what Christian theology says about the afterlife or what marriage means in the afterlife as Christian theology does not place the afterlife in a place that conforms to the common usage of the word heaven. The common usage of the word heaven amounts to a fairy tale place above the clouds that is paradisaical in nature but no such place is even hinted at in the Bible. To call the Christian conception of the afterlife the equivalent of the common conception of the word heaven is a misuse of both terms.
I'm not sure if you're genuinely being serious, here. What we were discussing was not the definition of the word "heaven", but the definition of the word "afterlife", and the post you quoted makes that quite explicit.
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