 In June 2010, Michael is shocked to learn from Lauren that Jill Abbott is her paternal half-sister, and he shares in his wife's anger over Jill changing her last name to Fenmore.Michael does try to convince Lauren to at least give Jill a chance, but Lauren stubbornly refuses to do so due to Jill filing a suit asking for a portion of the estate of her and Lauren's late father Neil Fenmore.He is later relieved when the two women work out their differences and start developing a sisterly relationship.