He threads his fingers through Duv's hand automatically, giving it a warm encouraging squeeze as he lets Duv set the pace of the kiss. Ivan's not the one showing, after all, although he could if David wanted it. Instead he's letting the other man lead, his free hand sliding into the hair at the nape of his neck.

None of this stops him from being completely thrilled with this turn of events, however. He's warm in his lap, eager in a way Ivan finds completely endearing. This could be a problem, Ivan's back brain supplies, while most of Ivan promptly ignores it.