Well, according to her, he's already said he was autistic. That's been established.
However, it shouldn't matter,...if,...you have settled on a communication style and relationship ground rules. I think this is a key with any relationship. We are all different, with different ways of interpreting things, how we like to be communicated to. At some point, early in the relationship, there needs to be that conversation,...basic ground rules,...direct vs indirect communication, dishonesty, deceit, controlling behaviors, your "personal baggage" from previous relationships, etc. You can't be six months into a somewhat rocky relationship and still discussing and changing the rules as you go along, miscommunications, hiding little things, tiny little lies, eroding each others trust,...that's unsettling in the least.