{Actually} (hol(9373)). Literally, wholly, altogether, like
Latin _omnino_ and Greek pant(9373) ( 1Co 9:22 ). So papyri have it
for "really" and also for "generally" or "everywhere" as is
possible here. See also  6:7 . With a negative it has the sense
of "not at all" as in  15:29  Mt 5:34  the only N.T. examples,
though a common word. {It is reported} (akouetai). Present
passive indicative of akou(935c), to hear; so literally, it is
heard. "Fornication is heard of among you." Probably the
household of Chloe ( 1:11 ) brought this sad news (Ellicott).
{And such} (kai toiaut(885c)). Climactic qualitative pronoun showing
the revolting character of this particular case of illicit sexual
intercourse. Porneia is sometimes used ( Ac 15:20,29 ) of such
sin in general and not merely of the unmarried whereas moicheia
is technically adultery on the part of the married ( Mr 7:21 ).
{As is not even among the Gentiles} (h(8874)is oude en tois
ethnesin). Height of scorn. The Corinthian Christians were
actually trying to win pagans to Christ and living more loosely
than the Corinthian heathen among whom the very word
"Corinthianize" meant to live in sexual wantonness and license.
See Cicero _pro Cluentio_, v. 14. {That one of you hath his
father's wife} (h(9373)te gunaika tina tou patros echein). "So as
(usual force of h(9373)te) for one to go on having (echein,
present infinitive) a wife of the (his) father." It was probably
a permanent union (concubine or mistress) of some kind without
formal marriage like  Joh 4:8 . The woman probably was not the
offender's mother (step-mother) and the father may have been dead
or divorced. The Jewish law prescribed stoning for this crime
( Le 18:8  22:11  De 22:30 ). But the rabbis (Rabbi Akibah)
invented a subterfuge in the case of a proselyte to permit such a
relation. Perhaps the Corinthians had also learned how to split
hairs over moral matters in such an evil atmosphere and so to
condone this crime in one of their own members. Expulsion Paul
had urged in  2Th 3:6  for such offenders.