An elderly British couple appeared in court this week, more than 40 years after they allegedly hired a killer to take out the husband’s previous wife. Prosecutors alleged that Allen Morgan, 73, and Margaret Morgan, 75, were in a “passionate, but forbidden and adulterous love affair” when they conspired to kill 36-year-old Carol Morgan, in 1981. The couple, whose case is being heard in Luton Crown Court, denied participating in a conspiracy to commit murder, the BBC reported. Prosecutor Pavlos Panayi alleged that the affair partners had regularly had sex in Margaret’s home, while her then-husba…