The "concubinus" might father children with women of the household, not excluding the wife (at least in invective).
en.wikipedia.org This sobering news, he says, has put an end at once to a strain of somewhat peevish invective.
en.wikipedia.org Passionate, impetuously imaginative, emotional, rebellious and imbued with romantic nationalist sentiment, his poems about freedom, his invectives against tyranny and his verses of lyric confession resonate with romantic pathos.
en.wikipedia.org His speech is said to have contained invective; he shared the puritan objection to instrumental music in church services, and made a point of the dissoluteness of cathedral singing-men.
en.wikipedia.org His style was gentle, candid, and decisive, and achieved its purpose by facility, clearness, and moderation rather than by powerful fervor and invective.
en.wikipedia.org