2 Decapitalized 'Demons' in title and added a question mark. Question mark after the end of the sentence. Made the one sentence two sentences.
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Can Demonsdemons have kids with humans?

I heard that some rishonim of blessed memory said demons can have intercourse with humans, so. So could demons have kids with humans  ?

Can Demons have kids with humans

I heard that some rishonim of blessed memory said demons can have intercourse with humans, so could demons have kids with humans  

Can demons have kids with humans?

I heard that some rishonim of blessed memory said demons can have intercourse with humans. So could demons have kids with humans?

1
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Can Demons have kids with humans

I heard that some rishonim of blessed memory said demons can have intercourse with humans, so could demons have kids with humans