YOU SAID:
my husband was sleeping when i was cheating
INTO JAPANESE
私は浮気していたとき私の夫は寝ていました
BACK INTO ENGLISH
My husband was sleeping when I was cheating
INTO JAPANESE
浮気しているときに夫が寝ていた
BACK INTO ENGLISH
My husband was sleeping while cheating
INTO JAPANESE
浮気しながら夫が寝ていた
BACK INTO ENGLISH
My husband was sleeping while cheating
You love that! Don't you?