Musashi just grins and raises a glass to Vash in greetings. She's reclining back against the rim of the tub, where a bottle sits waiting. And while she only has one towel vs Vash's two, she does have one.

It's folded up next to the bottle.

"No worries! You looked like you were enjoying yourself. Didn't want to interrupt." Sorry Vash, but she definitely looks when he jumps up. If every scar tells a story, then this guy is an absolute library. She's gotta get to know this guy better.

"No need to be shy! Come, come, have a drink with me." She did bring two glasses just in case, and she turns to reach for it and the bottle to pour for him.