Miku Ikuta - mon beau-père : partie 2

My son's wife, Miku, who lives with us, suddenly became very upset and asked me for advice about my son's affair. When I asked her about it, she said that her son was not answering the phone and was trying to cover it up. I tried to quiet her down, but her anger didn't seem to go away. I'm going to have an affair too! My father-in-law took pity on his daughter-in-law, and what did he do?