Seamus involuntarily stiffened a bit in her embrace, panicking just a little. What did he do? Ascribe to honesty being the best policy and tell her he hadn't originally known? That might earn him the hacked off reaction he'd been afraid of. But lying and saying he had known somehow didn't seem right to him either.
He sighed lightly. Maybe there was a compromise. Pulling back to look at her, he smiled gently. "Well, a little bird might've helped me out," he leaned in and kissed her softly, "but I do have somethin' planned now that I hope you'll like."