The Spokane String Quartet features two works inspired by love affairs at its next concert at 3 p.m. Sunday, Feb. 18, at the Bing Crosby Theater. Cellist John Marshall and violist Julia Salerno join the SSQ for Verklarte Nacht, Op. 4, by Arnold Schoenberg and String Sextet No. 2 in G Major, Op. 36, by Johannes Brahms.