Ashlee+Evan perform at Slim’s in San Francisco on Jan. 17, 2019. Photos: Mike DeWald. SAN FRANCISCO — There was some shroud of mystery going into Ashlee Simpson and Evan Ross’ Thursday night performance at Slim’s. For Simpson, how would she perform after over a decade removed from not only…

Ashlee Simpson and Evan Ross. Courtesy: Jiro Schneider. After living a relatively low-key life since their marriage in 2014, Ashlee Simpson and Evan Ross have been back in a big way since last fall. She, the former pop starlet, reality TV star and sister of Jessica Simpson; and he,…