Could he actually been joking about this?

So today I asked my romantic interest if he drank and he said no and that he promised his mother he wouldn’t because he believes its bad (don’t judge him pls) and he said the only time he had a drink was a little bit of champagne at a quinceañera. Long before at the beginning when we were less serious and joked around I remembered he said he was gonna cook and have a party. I jokingly asked
”do u drink?” His reply back then was “maybe, shhh ahh you didn’t hear anything.” It was a very childish reply and didn’t really seriously answer my question. However today almost 2 months later I recalled that and seriously asked him and he sweared he didn’t drink. Me being paranoid told him but u said “this” that one time I asked u long ago and he said it was stupid of him to say that because it was a joke, and that no he did not drink that day nor will he as he previously stated. Did what he say the first time I asked him if he drank (maybe, ahh shhh you didn’t hear anything) really could’ve been a joke?
Could he actually been joking about this?
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