Something deep inside Keltham is relaxing, the knowledge that he's not an impostor, that he'll be able to repay Cheliax and Carissa and all his researchers and everyone who's invested so much in him. Like, he was already making sure they got paid, putting the financial risk on the entity of Cheliax that could afford to take risky ventures, but - he knew they weren't entirely in it for the money.
...this sort of thing is why Keltham wanted to be a mad investor, in his past life, and not an entrepreneur. Entrepreneurs fail, sometimes, and don't repay what's been invested in them. As much as it's supposed to be the case that everyone knows this is a risk and voluntarily takes it, it's still roughly the most socially terrifying thing that anybody in dath ilan ever does under nonextraordinary circumstances.
He'll probably seem more comfortable in his own skin, more comfortable being himself, from now on. Including in bed.