Husband is related to Uncle. Uncle can be used for Fun. Swimming can be used for Fun. 
Unexpected is the opposite of Natural. Natural is a synonym of Legitimate. Legitimate is a synonym of Logical. 
Husband <--RelatedTo--> Uncle --UsedFor--> Fun <--UsedFor-- Swimming 
Unexpected <--Antonym--> Natural <--Synonym--> Legitimate <--Synonym--> Logical 