That sounds like it may have been an Ovy,and if in fact it was then that means she is gravid.they shed a couple weeks after ovy.At that point she is developing the eggs and that what causes the triangle shape,or also called 'ridge back' in their body.she also shouldn't feel hard at this point,more like waterballoon soft and getting plump in her latter half.
But how long ago was this paring?
If you haven't been keeping any track of follicle size there is a chance she could be building still as that pic doesn't't look like a clear ovy from that angle.
So this ridge back or V-shape thing is after or before ovy? I also have this girl that i thought i missed her ovy, but the thing is she's still glowing and having this V-shaped look.