According to reports, millionaire Maria Estela Larsson, 60, was strangled by her husband Anders Larsson, also a property tycoon, at their villa in the exclusive Quinta Patiño gated resort in Cascais.
Her body was found on Sunday night in a bedroom by a security guard.
Earlier, the victim’s 58-year-old husband, who had a business in Cascais, was said to have been seen by various witnesses jumping to his death off a cliff in Cabo da Roca.
After being contacted by the Maritime police, who were called to the suicide scene, GNR police officers paid a visit to the couple’s home to break the news of the Swede’s death but obtained no answer at the property.
Newspaper Correio da Manhã reports that just days before her death the Brazilian woman had won legal action brought against her by her siblings in São Paulo to continue as the legal representative of her mother’s estate.