Complex sentence: Just as they make up, Lampie's daughter Nora appears, saying that due to the ongoing tides from the sea, it is unsafe for Pete to stay and offers him food and shelter at the lighthouse, which Pete accepts.
Split into simpler sentences: Just as they make up, Lampie's daughter Nora appears, saying that due to the ongoing tides from the sea, it is unsafe for Pete to stay. She offers him food and shelter at the lighthouse, which Pete accepts.