Lucy (Hetti Bywater) has grown jealous of Mandy in recent weeks, and her frustration reaches a new level when she sees her dad Ian (Adam Woodyatt) fussing around the blonde like a puppy dog.
Deciding that she's had enough of her future stepmum, Lucy plays a nasty trick on the day of Mandy's (Nicola Stapleton) final wedding dress fitting at the Beale house.
Putting on an act, Lucy starts screaming about how she's 'seen a mouse', before 'accidentally' pouring a cup of coffee all over the wedding gown - leaving Mandy upset. Will anyone realise that Lucy has done it on purpose?
EastEnders airs these scenes on Monday, February 6 at 8pm on BBC One.
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