A 91-year-old woman is believed to have suffocated during a sex game with her 49-year-old neighbour.
The woman was found on her bed naked from her waist down next to a sex toy in Aveiro, 50 miles south of Porto, Portugal.
A married dad-of-two living next door has been arrested after DNA analysis of semen recovered from the scene.
He was released on bail after going before a judge who was told autopsy results showed she died from asphyxia thought to have taken place during a sex game that spiraled out of control.
