My husband had a vasectomy, but two months later I became pregnant. She called me a traitor, left me for another woman... but I had no idea that

My husband had had a vasectomy, but two months later I became pregnant. She called me a traitor, left me for another woman... but I had no idea that the biggest surprise was waiting for her in the ultrasound room.
When I saw the two pink lines on the pregnancy test, I burst into tears.
Not because I was afraid,
but because I was happy.
I thought it was a miracle.
My hands were shaking as I held the test and I ran to the kitchen to get Diego. He was sitting there, drinking coffee as if nothing in the world could disturb his false calm.
“I’m pregnant,” I said, with a voice broken by emotion.
Diego didn't smile.
He didn't hug me.
He didn't even ask me if he was okay.
He just left his cup of coffee slowly on the table and looked at me with cold eyes, as if he had just discovered something disgusting in his own home.
“That’s impossible.”
I got a knot in my throat.
“What do you mean?
“Diego let out a mocking laugh.
I had a vasectomy two months ago, Laura. I'm not an idiot.
That phrase hit me like a slap.
Idiot?
The man he had lived with for eight years, the man who once promised to face all the difficulties with me, now spoke to me with such contempt.
I tried to explain to him that the doctor had made it very clear: after the vasectomy, time was still needed for follow-up tests. We had to wait for confirmation. It wasn't like the surgery had made him instantly sterile
.
But Diego didn't listen to me.
In his mind, the verdict against me was already written.
“Who is he?” he asked.
I was frozen—.
What?
The baby’s father. Tell me.
A surge of nausea went up my throat.
Not because of pregnancy.