I'm secretly sleeping with one brother but have fallen for the other
DEAR DEIDRE: I’M spending a lot of time with two brothers who have helped me get over my childhood sweetheart suddenly dumping me.

TL;DR
- The author is dealing with a breakup from a childhood sweetheart.
- She is spending time with two brothers who are providing support.
- She is secretly sleeping with the younger brother.
- She has fallen in love with the older brother.