I think a part of Steve wants to be happy to see his mother again, but also I think he is a little confused. I’m sure he is glad to see his mother after all those years but still wants nothing to do with her. She left him when he was 12, moved away, started a new family and Steve just found this out. Jacey would be a little confused too because if their mom didn’t tell Steve about her new family, I cant see her telling Jacey about her old one. Jacey was happy after she got to ride the horse because that is something she loves to do. I think a lot of mixed feelings were going on with Jacey and Steve in this chapter.