[Oh, he absolutely lights up when Siffrin takes his hand like that.  So proactive!  And his hand is so warm without the glove in the way!  He's smiling and he's embarrassed and that's so okay, actually.  He's so okay with that.  Being embarrassed is nice, when it's like this.]

If you're sure.

[He flips his hand over so he can pull theirs into his, fingers brushing along their wrist as he folds that smaller hand into his bigger grip.  And after spending a moment just... quietly enjoying that little bit of contact, with this fond look on his face as he stares down at the link formed between them, he carries on like there was no pause in the conversation.]

I saw you watching me stretch earlier, by the way.  Were you interested?

[It was kind of hard to miss.  He's been clued into Siffrin's movements for ages now.  How was he supposed to not notice a set of eyes on him, eyes that remained glued there for several minutes?  But Siffrin was very clear when they spelled out for him just how much they do not, under any circumstances, want to "do stuff", last night.  So Isabeau isn't thinking about that at all; he's put the concept of any attraction on their part completely aside.  It doesn't even occur to him.  No, what he's wondering is if that staring means they want to...]

In joining me for morning stretches, I mean.  [Obviously!  And man, that would be so cool, actually.  They could be stretch buddies!]  You should!  It's important to keep your body limber!

[He turns over the hand he's holding again, grasping it with both his own this time, so he can trace the lines on Siffrin's palm. He's very deft with his knife, but if he wants to make sure that deftness carries over to later in life...]

I can teach you some really good ones for your hands.  Keep you from getting crinkly fingers in your forties.