Stories with a Common theme.

Among the 3 stories,"Lamb to the Slaughter", "Male Child" and "Love".I prefer Lamb to the slaughter the most.It captures my attention as :
-It starts off like a normal day for the Maloneys and Mr Maloney just came back from work as a detective.
-Mary Maloney seems delighted that her husband has returned and offers his some food.However,her her husband seems to be giving her the cold shoulder and is on the verge of confessing something to his wife.
-Mary tries to avoid her husband from trying to tell her something.She offers him food and even though he does not want it, she still give it to him.
-After being told about his suggestion for a divorce,Mary keeps her cool and pretends that nothing ever happened.
-Unfortunately,when Mr Maloney was about to go out,she loses her cool and whack her husband to death with a leg of lamb.
-She then covered up her misdeed and reported her husband's death to the police.
-The ending of the story was the most interesting part.She fed the detectives the evidence,the leg of lamb.
-At the end,she giggled when the detective said that the evidence could be right under their noses and got away with killing her husband.