I found an ambiguous message on my dad's mobile phone and showed it to my mom. Then my dad found out, what should I do?

Parents' affairs, if the family is not broken, must not interfere. It's better to be fleeting than to make irresponsible remarks in front of parents. What is not difficult to say will come true after you say it. When it's not broken, they don't quarrel, because they don't know, and they are disgusted with each other. This matter is over, and you don't want to do anything to remedy it.