Her 3 conditions.

She promised Hannah the same as Samuel. 

She promised to not do anything impulsive like how Hannah did which brought it on her life. 

Till now, Anna endured not only because she has something to do in the Xander Family but also because she values the sacrifice her sister made for her. 

Samuel was angry at Anna for being the coward. 

They had arguments and didn't talk to each other for years after Hannah's death. 

He in fact blamed Anna for her sister's death and Anna has also felt guilty and couldn't show her face to her niece Hazel. 

"What do you say?" Samuel asked after some time of silence. 

"I might take your offer but I have conditions." Anna answered. 

"Conditions?" Samuel laughed. 

Anna narrowed her eyes but didn't say anything. 

She already got accustomed to this attitude of her brother in law's. 

He, who initially was lukewarm with her, became even more sarcastic with her after her sister's death.