It takes until the reception until Steph even notices her doppelgänger. Her taller, prettier doppelgänger and damn, that is just not fair. Evil twins should not be dressed better than her.

She does some subtle recon, but clone Steph seems to know everyone at the wedding and definitely isn't just there for nefarious purposes. Everything seems perfectly ordinary which is very suspicious.

Finally, Steph goes for the direct approach.

"Sooooo..." She says as she comes up to her twin. Up close, Doppelgänger Steph looks older than her too. "I see that seem to have the same face."