Valmiki Ramayana Sundara Kanda Sarga 9 Shloka 59
Original Shlokaअत्यर्थं सक्तमनसो रावणे ता वरस्त्रियः। अस्वतन्त्राः सपत्नीनां प्रियमेवाऽचरंस्तदा।।5.9.59।।
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रावणे at Ravana, अत्यर्थम् therefore, सक्तमनसः devoted to (Ravana), वरस्त्रियः beautiful women, अस्वतन्त्राः having no freedom, तदा then, सपत्नीनाम् of their cowives, प्रियमेव pleasing , आचरन् did.
Even though the beautiful wives (should have been angry with their cowives for smelling their mouths) they behaved pleasingly, having no freedom to act with Ravana