What would you do....

So this friend i know has a boyfriend who dumped her, but still keeps texting, calling, and visitibg her. During tge week she was dumped by guy A, she fell into a relationship with guy B. Guy B goes to prison 7 yrs then 3 years into his sentence, he asked my friend out. Guy A finds out shes dating prison pal who is a mutual friend. Guy A throws a fit tells my friend if she visits jail bird ( guy B ) hed walk out of her life almost completely. My friend tells me about it and i offered her this advice, if it was me and doosh bag dude A dumped me, technically ur all exs so now youre free to date whoever u want. What would you do?