Bullets.

A woman was pregnant with triplets when she was shot 3 times.
15 years later her daughter came down stairs and said.
“Mum ive just been to the toilet and a bullet came out”
So the mother told her the story.
Shortly after her other daughter came down and said.
“Mum i just went to the toilet and a bullet came out”
She then told her the story too.

Later that day her son came down stairs and said. “Mum i just…”
Mother buts in and says " Let me guess. Went to toilet and a bullet came out?"
“No” her son says.
“I just had a ■■■■ and shot the dog”