My dad is sleeping with his female worker

My dad is sleeping with his female worker

Okay so I found out around two years ago that my dad is having an affair with a lady he had as his personal assistant. My siblings and I thought she was a nice aunt because she got things for us until she started following my dad home at night and spending the night in our guest room. I also got to discover that my dad buys whatever he buys for my mom for her too, that was what pushed me to investigate further to understand their relationship. I went through my dads phone sometime ago and found out what was happening but was scared to tell my mom, I only confided in my elder sister. We had some man of God come to pray for us one time and he revealed that the side chick my dad has is trying to ruin our home and break my parents apart. My dad promised my mom that the lady would stop being his P.A and he fulfilled that. Only thing is that she still works for him. Recently I stumbled on a chat my dad had with the lady and it seems they are still seeing each other. My dad travels to another state for business and he takes this lady with him. It’s getting too much, my mom doesn’t deserve to be treated this way. Please fam how do I tackle this and make that lady suffer because she’s good at manipulating my dad. Plus my elder sister is late and no one to confide in and make plans with and I don’t want my mom having sleepless nights over this. Help!