Issues with Triangles

Ginny finds out Harry is at shell cottage and rushes to see him. She doesn't expect to find Dean there too. How will this complicate things? First story, just something that popped up in my head and figured I would throw it out there and see if anyone liked it. Im not a pro but if one person enjoy it thats good enough. Gave it M to be safe. Harry/Ginny Ginny/Dean H/G