Erik was more surprised about Emma being able to take him into her throat than he was about her orgasm at the end of it. He had already edged Emma earlier, then with all the excitement that followed, Emma fulfilling her fantasy, and his modified cum, her orgasm wasn't that big of a surprise.
Seeing the disbelief on his face, Elora chuckled, "That sigil not only improves her body but also gives her more control over it." Then she shrugged, "I told her that, even if she used that sigil to stop herself from gagging, it was still going to hurt, but she didn't care."
With her explanation, Erik's surprise died down, but instead, he grunted with a little annoyance. He wanted to call Emma's actions stupid, and even blame Elora for letting it happen, but in the end, he didn't.
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