The auction was different at the two tables (one of them started with a strong 1D opener) but the fundamental question is the same. You bid uncontested:
2C 2D
2NT 3C
3D 3H
3NT 5C
?
2C = strong
2D = negative or waiting (you don't play any form of double negative)
2NT = 23-24
3C = 5-card stayman
3D = no 5-card major
3H = natural, 4 cards
3NT = no 4-card major, but exactly 3 spades
5C = to play
Partner could have passed 2NT, but instead has shown 4 hearts, 6 or 7 clubs and has promised no more than a 0-count. Partner could have bid 4C natural slam try over 3NT (or with a better hand transferred to clubs and bid hearts).
So, you aren't invited to bid on.
Do you bid on anyway?
[Edit: Hand amended to be consistent with the auction]

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