急!!20點!偷食，偷情，包二奶既英文係咩呀?

這些行為文字上稱為通姦、私通或婚姻外的性關係：
He has an affair with his secretary.
He commits adultery with his secretary.
He has extramarital sexual relationship with his secretary.

比較casual 的說法是說人 faithless, 意思是不忠的伴侶.

偷食:
make off with eat.


偷情:have a love affair stealthily .

包二奶:

have mistress