What should I do if my father-in-law is against my mother-in-law going to the dance and doesn't say anything himself but asks me to do so?

You can directly convey your father-in-law's meaning to your mother-in-law. And tell your mother-in-law why your father-in-law doesn't talk to him directly, so that your mother-in-law fully understands your difficulties, and he doesn't want to make things difficult for you, so he won't go to the square dance anymore.

Speak to your husband and ask him to convey it for you. If you think you will make your mother-in-law angry if you say it, then you should directly tell your husband about your difficulties and let your husband say it for you. Your husband and your mother-in-law are mother and son private relationship must be very good, they will be together often discuss some of the things in the family, this triviality you will leave it to your husband to solve it. And you have to tell your husband, your father-in-law's approach makes you feel very difficult, you do not want to be the messenger between in-laws. You feel that this will cause conflict between you and your mother-in-law, and your husband will go and find your in-laws and speak your mind with your in-laws, so that you won't have to deal with something like this again in the future.

Take your mother-in-law shopping and say when you are happy. If it's a case of you having to say it, you can take your mother-in-law out shopping with you. If you meet your mother-in-law's favorite gift in the mall, you buy it for her. When your mother-in-law feels very happy, you can convey your father-in-law's meaning to your mother-in-law, preferably as a joking statement to let your mother-in-law know what your father-in-law thinks. Your mother-in-law may complain about your father-in-law in front of you, you just have to listen. When your mother-in-law goes to the square dance you knock her around a little bit and remind your father-in-law what he is thinking so that your mother-in-law doesn't want to give you a hard time and won't go to the dance.

You can persuade your father-in-law that they should go dancing together. Your father-in-law doesn't want your mother-in-law to go to the dance and probably thinks he's too bored living at home. You can encourage your father-in-law and your mother-in-law to go dancing together, both of them will be very happy together, and your father-in-law will no longer be repulsed by dancing. Dancing is a great way for older people to exercise, and you should be supportive in encouraging them to do it.