He couldn't tell her no, but even Tony was a little put off by her decision. He'd never really been around the other version of himself, mainly because they stayed on their opposite coasts and took care of their company from their respective branches. Couldn't have been worse than looking in a mirror really. Though things had to have changed the other Tony, there probably were more similarities than differences.
"Sure it won't be too strange? Ant's probably going to be confused, but maybe he will sleep through most of it." If they were lucky.