My son-in-law always makes physical contact with me on purpose. How can I avoid it and not let my daughter be sad?

Avoid what? If you are willing to accept your son-in-law, you can always promise him to act secretly and not let your daughter know. What happened to your daughter? ! If you don't want to accept your son-in-law, I can also give you advice. I have an aunt in the city, dignified and beautiful, 40 years old, who can accompany your son-in-law as a lover or girlfriend. Nowadays, it is nothing new that men have wives at home and lovers outside. If you are interested in satisfying your son-in-law, just do as I say. As long as your son-in-law finds a beautiful new girlfriend, your son-in-law will "move on".