When the narrator reflects that his mother's description of his father and their situation was "so colored by her feelings that it was half truth," what did he most likely mean?

His mother, perhaps affected by her love for his father or her desire to protect her young son's feelings, painted an overly optimistic view of the situation.
Because his mother was receiving lots of money from his father, she decided to lie to her son, and falsely stated that his father was a good man.
His father had lied to his mother about his upbringing and social status, so her descriptions of him were affected by this.
His mother, because she was afraid her son would want to leave to live with his father, was not entirely honest about the situation.