A husband could start by giving her a hug and not immediately question her about being late. He can wait until she's comfortable and then have a calm conversation if he has concerns. For example, he might say something like 'I'm glad you had a good time, but I was a bit worried when you were so late. Can we talk about it?'
The husband should avoid being accusatory. Instead, he could share his own evening, like what he did while she was out. This shows that he's interested in a positive exchange rather than a confrontation. He might also suggest that in the future, they could set an approximate time to be back so that neither of them has to worry too much. This way, they can both enjoy their time out while also respecting each other's feelings.