A pair of Portuguese lesbian lovers inspired by the Showtime ​serial killer ​TV series ​“Dexter” allegedly killed and hacked up a man, chopping off his fingers to access his bank account and steal a more than $77,000 inheritance. Maria Malveiro, 19, and her girlfriend Mariana Fonseca, 23, a nurse, are accused of murdering Diogo Goncalves, a 21-year-old hotel worker, in Portugal earlier this year. The grisly details about Goncalves’ killing emerged as prosecutors get ready to put Malveiro and Fonseca on trial.