As Valentine's Day approaches, Cathy accompanies Cat to her maths GCSE evening class and is delighted to find the teacher, Eamon Hammond, is a hotty. Fellow student Deggs struggles to heed Cat's warning not to fall in love with her.

As Valentine's Day approaches, Cathy accompanies Cat to her maths GCSE evening class and is delighted to find the teacher, Eamon Hammond, is a hotty.

But as she lets her heart rule her head, there's growing tension between the sisters. Marilyn is excited to have the opportunity to be supportive about Cat's studies this time round, and teenage fellow student Deggs struggles to heed Cat's warning not to fall in love with her.

Cathy's ex, Marcus, is having less luck in his own love life as Valentine's Day ends in tears. Meanwhile, Angela resorts to kidnapping her own dog in an effort to win back husband Peter and Tess starts a new job in the worst place possible, proving to be the employee from hell.