It Happened to Nancy

The book has not said anything else about Nancy looking through the year books. But Nancy does eventually see Collin again! He is walking through the park holding hands with a thirteen year old girl named Margie. When Nancy sees the two walking together she wants to run over and hit Collin a couple of times and grab Margie and carry her to safety. But she does not she just keeps on her way. It is also Nancy's birthday and everyone is acting like they forgot and do not care because Nancy's mom wants to have her a surprise birthday party. Nancy's old childhood friend Lew even came which made her very excited because she trusted him and talked to him about anything. Lew made Nancy feel happy again and he also made her feel safe again. But the next day at school Nancy seen Margie again, and she looked depressed and did not look or act like herself. Margie was very quiet and did not talk to anyone. Nancy had figured that Collin had done the same thing to Margie as he did to her. This is all i have read so far, but i wonder if Collin did rape Margie? And how he started talking to her and hanging out with her like he started hanging out with Nancy because he seen Nancy haaving a panic attack so he took her in a hall and calmed her done so i wonder if Collin did something like this to Margie?!