I am glad the show is including the side stories with Valens's mom and Rush's attempted murderer. I think Valens' mom has breast cancer. It would be easy for him to find out what kind of doctor she was visting. Even thought she told him to trust her, she is going against the same trust by not trusting he can handle the truth. If she is terminal, the worst thing she can do is have Valens regret he wasn't able to help her during her time of need.