A woman sent my husband an ambiguous message, but he refused to admit it. What should I do?

Don't deliberately stop this kind of thing. That's what men do. The more you stop him, the more exciting he feels and the more he wants to play. What you have to do now is to observe his changes and decide what to do next. After all, it's just your intuition now, and there is no evidence. If you ask him now, he won't admit it, but he will be unreasonable and suspicious. Didn't you throw cold water on your face? He is an adult and knows what to do and what not to do. Now, relax, calm down and observe for a while before deciding what to do next. Everyone will try their best to help you solve the problem. Although our ability is limited, we are very United.