Srimad Bhagavatam Canto 10, Chapter 06, Text 09

SB 10.6.9

tam tiksna-cittam ativama-cestitam
viksyantara kosa-paricchadasivat
vara-striyam tat-prabhaya ca dharsite
niriksyamane janani hy atisthatam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Putana Raksasi’s heart was fierce and cruel, but she looked like a very affectionate mother. Thus she resembled a sharp sword in a soft sheath. Although seeing her within the room, Yasoda and Rohini, overwhelmed by her beauty, did not stop her, but remained silent because she treated the child like a mother.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Although Putana was an outsider and although she personified fierce death because the determination within her heart was to kill the child, when she directly came and placed the child on her lap to offer the child her breast to suck, the mothers were so captivated by her beauty that they did not prohibit her. Sometimes a beautiful woman is dangerous because everyone, being captivated by external beauty (maya-mohita), is unable to understand what is in her mind. Those who are captivated by the beauty of the external energy are called maya-mohita. Mohitam nabhijanati mam ebhyah param avyayam (Bg. 7.13). Na te viduh svartha-gatim hi visnum durasaya ye bahir-artha-maninah (Bhag. 7.5.31). Here, of course, the two mothers Rohini and Yasoda were not maya-mohita, deluded by the external energy, but to develop the pastimes of the Lord, they were captivated by Yoga-maya. Such maya-moha is the action of Yoga-maya.
Srimad Bhagavatam Canto 10, Chapter 06, Text 08
Srimad Bhagavatam Canto 10, Chapter 06, Text 10