History of Feminism

He did have relationships before Jane, including children, prior marriages/partners with whom he has good relations now, as I recall.

'In 1963, Sanders and Deborah Shiling, whom he met in college, volunteered for several months on the Israeli kibbutz Sha'ar HaAmakim. They married in 1964 and bought a summer home in Vermont; they had no children and divorced in 1966.[32][242][243] Sanders's son, Levi Sanders, was born in 1969 to girlfriend Susan Campbell Mott.[30] In 1988, Sanders married Jane O’Meara Driscoll (née Mary Jane O'Meara), who later became president of Burlington College, in Burlington, Vermont.[244] With her he has three stepchildren—Dave Driscoll, Carina Driscoll, and Heather Titus (née Driscoll)—whom he considers to be his own children.[32][245] He also has seven grandchildren.[246]'

https://en.wikipedia.org/wiki/Bernie_Sanders

Incidentally, above is the name of the Israeli kibbutz where he volunteered. I've read somewhere on DU criticism that he hadn't named the kibbutz. I guess he has.