In the interest of fairness and presenting both sides I would like to give some historical text on Poseidon and his sons. Keeping in mind I will be linking my credible sources at the bottom for anyone who would like to read further into the subject. As a disclaimer I would like to state everyone is perfectly entitled to honor whatever deity they like and interpret things however they want. But they should be given both sides and then be allowed to form their own conclusions.
"ARES WRATH : HALIRRHOTHIUS
LOCALE : Athens, Attika (Southern Greece)
Pseudo-Apollodorus, Bibliotheca 3. 180 (trans. Aldrich) (Greek mythographer C2nd A.D.) :
"Agraulos [daughter of Kekrops king of Athens] and Ares had a daughter Alkippe. As Halirrhothios, son of Poseidon and a nymphe named Eurtye, was trying to rape Alkippe, Ares caught him at it and slew him. Poseidon had Ares tried on the Areopagos with the twelve gods presiding. Ares was acquitted."
Pausanias, Description of Greece 1. 21. 4 (trans. Jones) (Greek travelogue C2nd A.D.) :
"There is a spring [near the Akropolis, Athens] , by which they say that Poseidon's son Halirrhothios deflowered Alkippe the daughter of Ares, who killed the ravisher and was the first to be put on his trial for the shedding of blood."
Pausanias, Description of Greece 1. 28. 5 :
"There is also the Areopagos (Hill of Ares) [at Athens] , so named because Ares was the first to be tried here; my narrative has already told that he killed Halirrhothios, and what were his grounds for this act."
Seneca, Hercules Furens 1341 (trans. Miller) (Roman tragedy C1st A.D.) :
"My land [Athens] awaits thee. There Gradivus [Ares] once cleansed his hands from blood [i.e. for the murder of Hallirhothios] and gave them back to war."
Link:
http://www.theoi.com/Olympios/AresWrath.html#Halirrhothios
https://en.wikipedia.org/wiki/Halirrhothius
"In a late version of the Medusa myth, related by the Roman poet Ovid ( Metamorphoses 4.770), Medusa was originally a ravishingly beautiful maiden, "the jealous aspiration of many suitors," but because Poseidon had raped her in Athena's temple, the enraged Athena transformed Medusa's beautiful hair to serpents and made her face so terrible to behold that the mere sight of it would turn onlookers to stone. [6] In Ovid's telling, Perseus describes Medusa's punishment by Minerva (Athena) as just and well earned."
Link: (Please keep in mind whether or not there was consent involved difers since there is more than one version. Wikipedia does actually cite their sources, this is a legitimate alternate version.)
https://en.wikipedia.org/wiki/Medusa
" Aloadai ) were Otus (or Otos ) and Ephialtes , sons of Iphimedia, wife of Aloeus, by Poseidon, [1] whom she induced to make her pregnant by going to the seashore and disporting herself in the surf or scooping seawater into her bosom. [2] From Aloeus they received their patronymic, the Aloadae. They were strong and aggressive giants, growing by nine fingers every month [3] nine fathoms tall at age nine, and only outshone in beauty by Orion. [4] [5]
The brothers wanted to storm Mt. Olympus and gain Artemis for Otus and Hera for Ephialtes. Their plan, or construction, of a pile of mountains atop which they would confront the gods is described differently according to the author (including Homer, Virgil, and Ovid), and occasionally changed by translators. Mount Olympus is usually said to be on the bottom mountain, with Mounts Ossa and Pelion upon Ossa as second and third, either respectively or vice versa. Homer says they were killed by Apollo before they had any beards, [6] consistent with their being bound to columns in the Underworld by snakes, with the nymph of the Styx in the form of an owl over them. [7]
According to another version of their struggle against the Olympians, alluded to so briefly [8] that it must have been already familiar to the epic's hearers, they managed to kidnap Ares and hold him in a bronze jar, a storage pithos , for thirteen months, a lunar year. "And that would have been the end of Ares and his appetite for war, if the beautiful Eriboea, the young giants' stepmother, had not told Hermes what they had done," Dione related ( Iliad 5.385391). He was only released when Artemis offered herself to Otus. This made Ephialtes envious and the pair fought. [ citation needed ] Artemis changed herself into a doe and jumped between them. The Aloadae, not wanting her to get away, threw their spears and simultaneously killed each other. [9] [10] "
Link:
https://en.wikipedia.org/wiki/Aloadae
"After having raped Caeneus, Poseidon fulfilled her request and changed her into a male warrior."
Link:
https://en.wikipedia.org/wiki/Poseidon