[NSFW] The wrong named screamed at the right moment, what would it do, or not, for you?

If you met this hot person of the opposite sex, or same sex if you bat that way, causally, at the company BBQ, at a party, a wedding, etc. Everything is going famously for a few weeks or more. You finally have the ”horizontal mambo” wicked sweaty you know, for those who need it spelled out, but not going and they reach the Big ‘O’ but while hitting it they grunt out, ”Oh [blank]!”, and that name uttered was not your name. What would that do to you? Because of the newness of the relationship, you would excuse it as they forgot your name? Would it be an instant mood killer? What would you think if it happened to you? [NSFW]