Watch: Lily Allen Alludes to Downfall of David Harbour MarriageLily Allen isn't getting involved in her daughters' relationship with her ex David Harbour. Following the former couple's breakup in February after four years of marriage, the "Smile" singer-who is mom to Ethel, 14, and Marnie, 12, with ex-husband Sam Cooper-shared that the Stranger Things star still keeps in touch with his stepkids. But as Lily told The Observer in an interview published Dec. 20, "I stay out of it.