Sentence 1: Steve asked his girlfriend if she would have an open relationship. 
 Sentence 3: Steve took that as they have an open relationship now 
 Sentence 4:  A week later, he sees online that she has a new boyfriend 
 Sentence 5:  Steve is shocked and annoyed 
 Option 1: She told Steve he can do whatever he wants. 
 Option 2: She told Steve that she was strictly monogamous.