I think it's interesting the Valar had children in the old versions of Tolkien mythology. Now I'm questioning myself, do the Valar have sexual relationships? Do you think they still can have children?
Yes I very much enjoy the older versions of the Valar too!
As for whether they have sexual relationships is, I think, totally up for the reader to decide. I don't think there is a right or wrong answer to this or headcanon at all!
Though whether they can have children I believe the answer is that they don't. I know in Tolkiens older work he made it where Melkor did for sure. But later went on to essentially scrap that idea. So no, I don't think the Valar can have children!

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Tolkien Elven Imagines and Headcanons Volume 1
FanfictionA collection of my Tolkien imagines and headcanons on my tumblr called The Elven Haven!