Her bogus-parents hahahaha
(It's actually: bo --- in law ; ge --- ambiguous gender)
why not "Kiel fartas sxiajn bogepatrojn?"
Because sxiajn bogepatrojn is the subject of the sentence, not the direct object. In other words, it's what's been talked about, not what's been acted upon.
Because it's from "ŝiaj bogepatroj fartas". The word order does not matter, see the other comment.
is gebopatroj correct?
I'm pretty sure there is a set order of the terms, so bo has to go before ge.
What's the affix, "bo," doing here?
It means in-law