Bruce's shoulders relax pretty visibly, and his expression... softens a touch, out of the calculated wariness. It's response to Asmodeus, yes, but it's also because there's a less... threatening discussion in front of him.

"Which of them did you choose first?" It is by far not the weirdest arrangement of building a family he's heard of.

The Lord of Hell adopted him and owns his soul. This is comparatively tame. Though he more than half assumes the woman involved was paid for her services. And that she's dead. The dead is unrelated to the paid.