My mother-in-law insisted on a DNA test because our son was born with blond hair. I thought my husband trusted me, but his mother was much more persistent.

“Sorry, but my mother… doesn’t give up. What if she’s right? Could you take this test to put this to bed?”

That hit me hard. I knew I hadn’t cheated on my husband and that the baby was indeed his, but the request hurt.

“Okay,” I replied. “Let’s take this test. But then you’ll do what I tell you.”

When the results came back, I gathered the whole family to tell them the truth.

Continued in the link in the comments 

Andrei and I have been married for almost four years. Our marriage wasn’t complete, but we loved each other and did everything we could to resolve our problems.

However, one problem persisted from the beginning: his mother, Tamara Petrovna.

She made no secret of the fact that she didn’t like me. We elegantly lived separately, and our meetings were limited to special occasions. I tried to ignore her harsh remarks, but after the birth of our son, the situation changed.

Tamara Petrovna came to our house about every day. At first, I thought she was just trying to help, see her grandson, or give advice, but I quickly realized she had other intentions.

“Andrei, you need to take a DNA test,” she kept repeating.

“Mom, stop,” he would tell her. “It’s my child, there’s no need to verify the obvious.”

“Obvious?” she grumbled. “Look at him. He doesn’t look like you at all. Blond hair, different eyes. Can’t you see?”

I tried to act calm. Andréi knew the baby was indeed his, but his mother was becoming increasingly insistent.

She talked to Andréi incessantly, even convincing other family members that the child wasn’t his. Little by little, they began to believe it.

One day, Andréi came home with a remarkable expression. He was calm and avoided looking at me. I knew something was wrong.

“Sorry, but my mother… doesn’t let it go. What if she’s right? Could you do this test to get this over with?”

It hurt me completely. I knew the baby was his, but this request made me doubt his fiancée’s attitude toward me.

“Okay,” I replied. “Let’s take this test, but then you do as I tell you.”

Andrei glanced at me in surprise, but he agreed.

We took the test, and a few days later, the result came back: “Probability of paternity — 99.99%.” Andrei sighed with relief, while Tamara Petrovna remained silent for the first time.

“So, Mom, are you satisfied now?” Andrei asked her.

She shrugged.

“Okay, I was wrong. But still…”

I wasn’t listening to her anymore. I had already packed my suitcases.

“Where are you going?” Andrei asked, shocked.

“I’m leaving,” I replied. “I can’t live with someone who doesn’t trust me.”

“Sorry, I was stupid! I didn’t mean to hurt you! My mother is responsible…”

“You’re the one who allowed him to destroy our marriage. For now, live with that decision.”

I left. Since that day, I’ve never spoken to my ex-husband or his family again. Andréi called me, wrote me, and apologized. But it was too late. Once an engagement is broken, it can’t be repaired.