I am sorry that happened to you but it's really between mom and dad. You don't know what's happening in their marriage. They might have open marriage for all you know or they might have whatever agreements etc if your mom cheats she cheats on her husband not on you. You can confront her but I wouldn't interfere in their marriage by telling your dad. If you are an adult I recommend you move out, then you don't have to see anything like that.

Again it's disturbing and I feel sorry for your dilemma but I wouldn't give ultimatums or meddle in their marriage. Just tell mom you saw texts

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