Rob has been spending a lot of time with Carla lately, bringing Lily to suspect that Carla fancies him. Martha decides its time to discover the scientific origin of Lily's 'gut feeling'.

Carla and Lisa have grown close over the past few months, though a charged moment between them left them both spooked, and made things awkward between ... on notifications so you can see when ...

Lily's gut instinct tells her that fellow pupil Carla fancies Rob. Rob denies this but Lily sets out to prove her gut instinct is correct with the help of Martha.