Now that Billy mentions it, Steve can actually see the resemblance between him and Wanda. And while he'd only spoken to Tommy a couple of times when he'd been here, he can definitely see how he takes after Pietro too. Granted, that doesn't explain how they came to be. Billy said something about Wanda having the "means" to have them, which implies that there's more to this whole story.

Billy's warned that it's confusing, but Steve doesn't see how he can't ask at this point. He leans himself against the couch a little more and braces himself.

"What do you mean, the means to have you?" Billy hasn't even mentioned who their father is yet, although Steve gets the feeling he's about to find out.