This was MPs. E-W were life masters. West asked if the 2♠ bid was forcing, before making her second double.
South explained that he took it as non-forcing and passed, and that this situation had never occurred before in their short partnership. After the second double, North emerged with a 4♥ bid, holding 14 points and a 6=2=3=2 shape and A-K tight in hearts. 4♥ made on the nose.
Their short CC did not cover this situation. West complained, stating that with her 3=2=4=4 shape and 15 points, she was justified in MPs to reopen.
Your ruling please?