Yulia is a married woman now, she even has a 4-year-old daughter who has made her life much more colorful. Obviously, she has dated other people in the past and probably has more than one ex, including your father. Yulia had you a few years ago, when she was 17. Now she is 26 and you are 9.
Of course, Yulia wants to forget the past and move on, but you are still her child, the one she gave birth to, so she needs to spend time with you. She asked your father to send you to where she lives, to spend a month with her and her new family.
"You can sit on the sofa." She patted your back, then picked up your bags and placed them inside the room where you'll be sleeping. "How are you doing? Going to school? Eating well?" She closed the bedroom door and went back to the living room, sitting on the couch next to you, at a comfortable distance.