My Mom Says Her Cheating Didn’t Affect Us

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This situation is intense because it’s not just about cheating—it’s about how that betrayal ripples through a family. The OP, a 16-year-old girl, watched her parents’ marriage collapse after her mom had an affair and quickly moved in with the other man. While her mom tried to act like nothing had changed, OP couldn’t just go along with it. The emotional whiplash—from a “normal” family to divorce and a new partner instantly in the picture—left her hurt, angry, and unwilling to maintain a relationship outside of court-ordered therapy.

Over time, therapy became less about healing and more about frustration, especially as her mom insisted she had done nothing wrong as a parent. But during a session with a new therapist, OP finally spoke up. She laid everything out—how the cheating shattered their home, how it affected her and her brother, and why she now sees her mom differently. Most importantly, she said it plainly: her mom’s actions didn’t just hurt her dad—they made her a worse parent. Now she’s wondering if telling that truth crossed a line… or if it was long overdue.

This is one of those situations where emotions are running high, but underneath all that, there’s a really important question: can a parent’s actions in their relationship affect how good of a parent they are?

Your mom’s argument is basically this—“what I did to your dad is separate from how I treated you.” And on a very technical level, some people might agree with that. If a parent still feeds you, shows up to school events, helps with homework… they might say, “see, still a good parent.”

But real life isn’t that clean.

Families are systems. When something big breaks—like cheating—it doesn’t stay contained between two adults. It spills over into everything. The home environment changes. The emotional safety changes. The trust changes. And for kids, especially teens, that shift hits hard.

What you described—the sudden move from a stable home to divorce, to your mom immediately living with her affair partner—that’s a major emotional disruption. And you’re right about something really important: in most divorces, kids are given time to adjust. There’s usually a transition period. Space to process. Space to grieve what’s changing.

Cheating often removes that buffer.

Instead of a gradual shift, it’s like everything flips overnight. One day your family is intact (or at least appears to be), the next day it’s exposed as something else entirely. And then, before you’ve even processed that, there’s a new person being introduced into a role that feels… intrusive.

That’s not just uncomfortable—it can feel like your reality got rewritten without your consent.

So when you said your mom didn’t think about you and your brother when she made those choices, that’s not just anger talking. That’s a pretty grounded observation. Because parenting isn’t just about direct actions toward your kids—it’s also about the decisions you make that shape their world.

And your world changed in a painful way.

Now, let’s talk about the therapy moment itself, because that’s actually really significant.

You were encouraged to speak honestly—and you did. Not in a vague way, not in a filtered, “polite” version of your feelings. You said exactly what you’ve been holding in. And yeah, it came out strong. Some of your wording was blunt, even harsh. But therapy isn’t supposed to be a place where you perform politeness. It’s supposed to be a place where you’re real.

What stands out is that your response wasn’t random or purely emotional. You actually explained your reasoning:

You connected her cheating to the breakdown of your home
You explained the lack of transition and adjustment time
You pointed out the expectation to accept her new partner immediately
You addressed how she minimized your feelings and blamed you for your brother

That’s not just lashing out—that’s structured, thoughtful expression. It shows you’ve been processing this for a long time.

Now, where things get complicated is the statement: “it made you a worse parent.”

That’s a heavy thing to say. And it’s going to hit hard, no matter how justified it feels.

From your perspective, it makes sense. Parenting includes protecting your kids’ emotional well-being, and in your eyes, she failed at that. So in your framework, yes—her actions lowered how you see her as a parent.

From her perspective, though, she probably hears that as a total rejection of everything she’s ever done right. People tend to go into defensive mode when their identity—especially something as core as being a “good parent”—is challenged. That’s why she keeps repeating that she “never failed you.”

It’s not just about convincing you—it’s about protecting how she sees herself.

And that’s why you’re stuck in this loop. You’re talking about impact, and she’s talking about intent.

You: “This hurt me and changed everything.”
Her: “I didn’t mean to hurt you, so I didn’t fail you.”

Those don’t match, and until they do, you’re both going to feel unheard.

Now, about your brother—this part matters too.

Your mom saying he’s just copying you is a way of avoiding responsibility. It’s easier to believe one child is influencing the other than to accept that both kids independently feel hurt. But kids, even younger teens, are capable of forming their own opinions. Especially in situations like this.

So again, your frustration there is valid.

But let’s zoom out for a second.

Are you wrong for feeling this way? No. Not at all.

Are you wrong for expressing it? Also no—especially in a therapy setting where that’s literally the point.

But could the delivery have been softened in a way that might lead to more productive conversations? Maybe.

Not because your feelings are wrong—but because if your goal (even slightly, someday) is to be understood, tone can affect how your message lands. Right now, your message hit like a wall. And sometimes when people feel attacked, they stop listening—even if what you’re saying is true.

That said, you also made it clear you’re not open to changing your view right now. And that’s important. You’re being honest about where you are emotionally. Healing and perspective shifts take time, and no one can force that.

One more thing worth saying: you’re 16. You’re still in the middle of this, not looking back on it from years later. The emotions are fresh, the changes are ongoing, and you’re still adjusting. Expecting you to respond with perfect emotional balance or long-term perspective isn’t realistic.

You’re reacting like someone who got hurt and hasn’t been given the space or acknowledgment to process it properly.

And honestly, that’s human.

See The Comments Below

This leans strongly toward Not the A-hole.

You didn’t say anything just to hurt your mom—you said it because it’s how you genuinely feel, and you backed it up with real reasons. Therapy is one of the few places where you’re allowed to be that honest.

Was it harsh? Yeah, a bit.
Was it unfair? Not really.

You’re dealing with a lot, and instead of pretending everything’s fine, you finally said the truth out loud.

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