The works themselves ask 18 questions under this heading — see them together with their answers.
Also asked about as…
sex with a relative (ed.)
In the index as Incest (Incestus) · Intercourse apt for generation · Affinity · Blood relatives · Effects of affinity · Legal relationship · Lust · Act · Adoption · Adulterous affection in the conjugal act · Degree of consanguinity · Effect of sin and confession · Impurity · Incestuous intercourse · Intercourse · Master · PASTOR · Public Honesty · Public propriety and intercourse · Specific distinction of consanguinity from affinity · Spiritual Relationship
In the manuals
Read the manuals side by side → — each work's whole treatment in its own column
A Manual of Moral Theology for English-Speaking Countries
Vol. I, Bk. VI, Pt. VI, Chapter II. Consummated Sins of Impurity, n. 3 — Incest is carnal intercourse with relatives by blood or by marriage. Besides its general malice against chastity, incest is against the special virtue of piety, which prescribes due reverence toward, and abstention from … Read in context →
Vol. II, Bk. VI, Chapter IV. Confession, n. 4 — A number of special questions must here be considered which touch on the integrity which is required in confession. The Council of Trent, as we have just seen, teaches that those circumstances which change the nature of … Read in context →
Manual of Moral Theology (Manuale Theologiae Moralis)
Vol. III, Bk. I, Pt. I, Sect. II, Ch. II, § 3. On Incest, nn. 38 & 39 (2 passages — hover a number to read it)
Moral Theology: A Complete Course (McHugh & Callan)
Vol. II, Pt. II, Q. II, Art. 8. The Virtue of Temp…, Incest, nn. 2531 & 2532 (2 passages — hover a number to read it)
Institutions of Moral Theology (Institutiones Theologiae Moralis)
Vol. I, On the Sixth and Ninth Pre…, I. On Acts of Lust Not Consummated, n. 766 — Does indirectly voluntary lust admit lightness of matter? - R. Affirmatively, because then there is no consent or direct intention in venereal pleasure, but only in the cause, which is lightly or gravely sinful according… Read in context →
Vol. I, On the Sixth and Ninth Pre…, II. On Sins of Lust According to Nature, nn. 795, 797, 798 & 799 (4 passages — hover a number to read it)
Vol. IV, On Marriage, III. On the Impediments of Marriage, n. 1003 — Note: When there is question of one who wishes to marry a daughter after having fornicated with the mother, the condition is usually added in the dispensation, provided that copulation with the mother did not precede the… Read in context →
Commentaries on the Nature of Moral Theology, on Conscience and Probabilism, on the Fourth Precept, and on the Sixth and Ninth Precepts of the Decalogue (Commentarii)
Ch. II, Article VI: On Incest, nn. 73, 74, 75, 76, 77, 78, 79, 80, 81 & 82 (18 passages — hover a number to read it)
Compendium of Moral Theology of Fr. John Peter Gury, S.J., with the Notes of Antonio Ballerini, S.J.
Vol. I, Treatise On the Precepts o…, On the Sixth and Ninth Pre…, Ch. II, Art. I, § III. On Incest, n. 423 (3 passages — hover a number to read it)
Synopsis of Moral and Pastoral Theology
Vol. II, Supplement: On the Virtue of Chastity, nn. 42 & 43 (2 passages — hover a number to read it)
On Chastity and on the Contrary Vices: A Doctrinal and Moral Treatise
Ch. I, Art. I, § 2, III. On Incestuous Copulation, nn. 315, ¶1651, ¶1652, ¶1653, ¶1654, ¶1655, ¶1656, ¶1657, ¶1658, 316, ¶1659, ¶1660, ¶1661 & 317 (14 passages — hover a number to read it)
Pastoral Questions
Article IV: Concerning Incest, nn. ¶213, ¶214, ¶215, ¶216, ¶217, ¶218, ¶219, ¶220, ¶221, ¶222, ¶223 & ¶224 (12 passages — hover a number to read it)
Institutiones Morales Alphonsianae
Vol. I, Pt. II, Sect. II, Tr. VI, Ch. II, Art. I, § 5. On Incest, nn. ¶783, ¶784, ¶785 & ¶786 (4 passages — hover a number to read it)
Theologia Moralis Sancti Alphonsi: Reduced into a Compendium
Vol. I, TREATISE ON THE PRECEPTS O…, Ch. III, Art. I, § III. On incest, n. ¶495 — 495. Definition. - Incest is concubitus with a person joined by kinship or affinity within the degrees in which it is not licit to enter Matrimony. But kinship is threefold: natural, namely among blood-relations up to th… Read in context →
Manuale Theologiae Moralis
Vol. II, Tr. XIII, Ch. III, Art. V, Namely, Lust, § 4. On the External Sins of Lust Consummated According to Nature, n. 701 — 701. 4. Incest is carnal intercourse between blood relatives or relatives by affinity who according to natural or ecclesiastical law cannot enter marriage. Under the name of relationship comes also spiritual and legal re… Read in context →
Summa Theologiae Moralis
Vol. II, Special Moral Theology: On…, Treatise: On the Cardinal …, Fourth Part: On the Virtue…, Question Three: On the Spe…, Article I: On Luxury According to Nature, n. 1012 (13 passages — hover a number to read it)
Compendium of Moral Theology
Vol. I, Tr. VI, On the Sixth and Ninth Pre…, Ch. II, Art. I, § III. On Incest, nn. 293 & 294 (2 passages — hover a number to read it)
Palladium Theologicum, Tome V: On the Virtues
Tr. VI, Disputation II: On the Vic…, Q. III, Doubt V: On incest, nn. 1–23 (23 passages)
Treated under the broader heading Consummated Sins of Impurity — Noldin, Summa of Moral Theology · Vermeersch, Theologia Moralis · The Roman Catechism — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)