Complex sentence: Sulkowicz expressed concern they would be used to present her as unreliable, and stated she had sent the messages because she was upset and wanted to talk to him about the incident but decided against doing so.
Split into simpler sentences: Sulkowicz expressed concern they would be used to present her as unreliable. After the messages were released, Sulkowicz stated she had sent the messages because she was upset and wanted to talk to him about the incident, but decided against doing so.