Monday night's episode saw Heather (Cheryl Fergison) come under suspicion when envelopes identical to the ones that Phil (Steve McFadden) has been receiving were found in her handbag.
Heather has now been unveiled as suspect number 12 on the official EastEnders website and her dedicated video reveals her hatred of Phil's bullying ways.
Tired of being mistreated by Phil and disapproving of his attitude towards Ben, could Heather be taking the ultimate revenge?
EastEnders' official list of stalker suspects now features Heather, Michael Moon (Steve John Shepherd), Jack Branning (Scott Maslen), Janine Butcher (Charlie Brooks), Rainie Cross (Tanya Franks), Jay Mitchell (Jamie Borthwick), Ian Beale (Adam Woodyatt), Mandy Salter (Nicola Stapleton), Alfie Moon (Shane Richie), Denise Fox (Diane Parish), Ben Mitchell (Joshua Pascoe) and Lola Pearce (Danielle Harold).
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Watch Heather's official suspect video below: