Strange Platy Behavior

[Ilovemyfishies]

My female platy is in the breeder waiting to drop fry. My 4 other Platy's have been hanging out together in a clump in the top corner of the tank. They were doing this earlier as well before I put her in the breeder, as she was hanging out in the corner. Are they depressed or are they just patiently waiting the birth?

 

[Snorkleboy]

My platys usually do the same, I think it's because they all school together somewhat. They probably are just patiently waiting to be a full school again.