Shav is racked with guilt - she's committed the cardinal sin of all couples: TV cheating. When Mark finds out his girlfriend watched a whole series without him, he decides to see how far she'll go to keep her affair secret.

Shav feels undervalued by Mark's reluctance to go public with their relationship, while Mark doesn't understand why she needs to show off on social media. Cue Shav taking matters into her own hands, with the help of a nearby Instagram model...