You are playing in a teams event, and RHO opens a weak 2S.
You bid 4C, leaping michaels, showing clubs and hearts.
LHO bids 4S, and your partner thinks for a bit, before offering 4NT.
This is the first time you've ever played with this person and you have no agreements here obviously. Your partner is no mug though and you suspect that this is just some sort of slam try. What do you bid and what are your thoughts on your hand in general anyway?

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