nourish a viper in (one's) bosom

To befriend, look after, or take care of someone who proves to be traitorous, untrustworthy, deceitful, or ungrateful. I thought the profligate had seen the light and was seeking redemption, and so I took him into my care. But before long, I knew I had nourished a viper in my bosom, as I awoke one morning to find myself robbed blind! I thought our love was not only mutual but indestructible; and yet, I have nourished a viper in my bosom all these years: my darling husband has cast me out and run off with a younger woman.

Common Names:

Name	Pronounced	Usage
Michael	MIE-kəl (English), MI-khah-el (German), MEE-kah-el (Swedish, Norwegian, Danish)	English, German, Swedish, Norwegian, Danish, Dutch, Czech, Biblical, Biblical Latin, Biblical Greek
Lulu (2)	-	Arabic
ÉLie	-	French
Concepta	-	Irish
Alexandros	-	Greek, Ancient Greek, Biblical Greek, Greek Mythology
Olufunke	-	Western African, Yoruba