When a girl comes to her period, her mood is the most unstable, so she will get angry inexplicably. Then at this time, girls' minds are the most sensitive and their emotions are the most delicate. She wants someone to accompany her and take care of her.
Then I can see that you are also very kind to her, knowing to take care of her when she is uncomfortable. Then you see, he told you to feed and walk slowly in the hope that you would be kind to her and take care of her. Her idea is simple. She loves you very much and wants to be a child in front of you.
It is easy for girls to get angry when they have their period, and their resistance is not good, and they are even more insecure. So, she regards you as her dependence and her whole. She really loves you.