Parents

Guys I seriously need help, a few months ago my mom found out my dad had just been married to another woman, and they got into it and hardly even talk anymore. My moms ex has recently been talking to her and my dad isnt happy about it. They have both been dragging me into this situation, and they ask me for favors to find out whats the other person doing and things like that, my dad has asked me to tell him my moms password to her phone and I'm stuck because i dont know what to do, and im scared cause i dont want them to get mad at me. Theres a lot more to this story but its more personal and i wish not to get in to but heres a little overview and any advice would help!