Sister by Day, Mistress by Night
15 Episodes
4.5 / 5
1 ratings
Released 2026
Rosa Ryan, a fallen nobleman's illegitimate daughter, seduces Duke heir Lucien Voss to survive. By day they pose as distant cousins; by night they share a forbidden affair. When Lucien is engaged to Sophia, Rosa plans to marry commoner knight Jon and escape—only to discover Lucien has no intention of ever letting her go.