I can see how that happened
What you say when you see a hot mom with a baby because you're jealous and you're trying to act cool. You're just saying the kid was the reason she got there.
He saw her with the baby and said, 'I can see how that happened,' like the kid was the reason she was there.
She walked into the store with the baby and he said it like the kid was her backup plan.
He said, 'I can see how that happened,' when she walked by with the kid. He was jealous and trying to be cool.