There has to be an explanation for this:
Being close to her put more bubbles in his blood than the very best French champagne.
That's what happens when you
come to the surface too fast, you silly git. That can kill you.
So they've finally come back to London from Vienna and I can stop looking up ridiculous German words and members of the Habsburg dynasty. But now the heroine is being your standard fucking idiot and blubbering about how he only wants her for teh sexxoring but she's in twu wuv but her dying father's all angry because this fake engagement means her estranged uncle will get his hands on the family estate blah blah I wish they'd go back to fucking in Austria.
Ew:
Jasmine swallowed. "You got what you wanted, didn't you?"
Adam's head went up and he glared at her. Maybe he deserved that at the start, the old "you owe me" flung back in his face [that's because you LITERALLY SAID "YOU OWE ME SEX" LIKE 100 PAGES AGO, ASSHOLE]. But what about Vienna? Not that he begrudged a single penny, but he'd paid handsomely for his demand. Her lack of appreciation angered him.
It is no longer at all surprising that this "hero" is a stockbroker. Master of the Universe, you, sir, are slime.