You are playing a method where your opening 1♠ bid at this vulnerability promises 10 or more HCP. Partner's 2♥ bid is not game forcing. Systemically, these are your options over 2♥:
2♠ - mark time bid - does not say anything - partner will describe his hand
2NT - artificial game force - you will tell partner what type of hand you have on the next round.
3 of a minor - natural, game forcing.
3♥ - natural, invitational
3♠ - natural, invitational
3NT - to play
4 of a minor - splinter
4♥ - to play
4♠ - to play
Note: Partner's 2/1 is not game forcing, but it does promise values. And he knows that you have promised only 10 HCP.
I chose another bid - 5♦ Exclusion RKCB (1430 responses). If partner has only one key card outside of diamonds, I would pass (he cannot have 4 key cards outside of diamonds). I deliberately dismissed the possibility of partner holding 0 key cards as unlikely - if that is the case, we are getting to a slam off two cashing aces and the trump king. While the 5♦ bid was somewhat risky, it seemed to me to be the best way to get to a grand when it is there and an easy way to get to a small most of the time.
Your thoughts?

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1♠ - (P) - 2♥ - (P)
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