I think my dad is having an affair? what do I do?

[john]

I would ask him. I would not tell my mother. I would tell him exactly what you have seen and tell him how worried you are. Tell him he doesnt have to tell you the truth but you dont think you could ever forgive him if after telling him your suspicions, it is found out that he had or is having an affair. Tell him if he is to sort his s#%t out and end it.

If your mum isnt enough for him he should try and work on his marraige with her before he goes elsewhere and wrecks a whole family. I would show him this on yahoo answers. Dont ask for truth, its likely he wont give it. Ask him to stop before its too late if something is happening and that you will forgive him if he does. You dont need details.