"zu ihren Freuden" quick question

[bel99]

Her friends or their friends or either?

I answered "her friends". Duolingo says No, it's "their friends". I'm scratching my head trying to figure out why.
Possessive pronouns are doing me in.

[christian]

What's the complete sentence? The clue might be in the verb conjugation.

[fuchs]

duolingo seems to be wrong. I checked on Google translate which gives: "er geht zu ihren Freunden" -> "He goes to her friends". Maybe the context (the sentences before) implies duolingo's translation.

[bel99]

Okay I'll try to find the whole sentence again, thanks guys.