She wanted the financial security that her fiance offered but
wanted the dikk from three brothers......the same gotdamn family

.
Messing with one dude might have worked but three brehs that are related? How did she think no one would find out? She should have just moved to a bigger city and found a 30 year old breh with money....satisfy her $$$ and dikk needs at the same time.
My guess is that she was the greedy type. Could have easily had an open relationship or poly set up but she wanted all the dudes to herself.