on the wrong side of the blanket

Prepositional phrase

(born) illegitimately, outside of wedlock

Japanese Meaning

婚外で生まれた / 非嫡出に生まれた

Growing up on the wrong side of the blanket, she struggled with stigma despite her parents' love.

婚外で生まれて育った彼女は、両親の愛にもかかわらず偏見に苦しんだ。

Sense（1）

(born) illegitimately, outside of wedlock