What do we infer, suspect, her husband told Mary in the four-five minutes? in "The Lamb Slaughter" need answered by 3:00 today please and thanks

We are not totally sure what Patrick says to his wife but we can infer that he wants a divirce:

But I've thought about it a good deal and I've decided that the only thing to do is to tell you immediately." And he told her. It didn't take long, four or five...