By Riley Gutiérrez McDermid Her intervention might hold more weigh with given her alleged relationship with Putin, and could signal a new stage in the war’s diplomatic process. The alleged mistress of Russian President Vladimir Putin, is being pressured by friends to convince him to end the unprovoked and increasingly violent invasion of Ukraine, a new report says. Putin’s private life has long been off-limits to the world’s press, but he is rumored to have fathered four children with former Olympic gold medalist Alina Kabaeva. Putin divorced his first wife, Lyudmila Ocheretnaya, in 2014, but …