"हमारा रिश्ता क्या है?"

Translation: What is our relationship?

[xyfell]

Is the answer to this question expected to be "you are my sister" or "our relationship is good"?

[vinay92]

The former. 'How is our relationship?' would be हमारा रिश्ता कैसा है?

[BCowzy]

Is this just family, or could it also be asking friendship or romantic relationship?

[Uma388438]

This would actually mostly be for friendships/romantic relationships (romanships?). Most cousins are just called bhai or behen (if that). And it's kind of awkward to ask a relative how you relate to them.

[lavdwivedi]

Another one: How are we related?

[EthanJose10]

रिशते में हम तुमरे बाप लगते हैं।