Some people think that Lady capulet is more responsible because she encouraged Juliet to marry Paris without considering her true feelings and did not support her in her love for Romeo.
The quote is from Act 3, Scene 5, where Lady Capulet tells Juliet, "Marry, my child, early next Thursday morn / The gallant, young and noble gentleman, / The County Paris, at Saint Peter's Church / Shall happily make thee there a joyful bride." This shows how Lady Capulet is pressuring Juliet to marry Paris without considering her true feelings.
