Such an alibi provided by the husband may not be enough. Might as well both be suspects,
someone should have seen them at the club together, and they pretended not to know each other when they were in this club but if the police press them they will have to reveal what they were doing there and it would turn out how they had fun, I wonder if the girl who invited him to the dance will be important later, because she can give him an alibi, because I think this event was for what it was.
It's all speculation, we'll see what happens