Question: Who is Mugain's mother-in-law?

Knowledge 1: Mugain
Mugain, daughter of Eochaid Feidlech,  , is a legendary queen in the Ulster Cycle of Irish mythology; characterized as the "Strumpet wife of Conchobar mac Nessa", the king of Ulster.Also styled Mumain, she bore him a son named Glaisne.She was also a sister of Medb by paternity.Her epithet, "Aitinchairchech", literally means "having gorse-like body hair", or perhaps more specifically pubic hair.When Cúchulainn returned to Emain Macha after his first foray, his fury was so great the Ulstermen feared he would destroy them.Mugain led her maidens out, and they bared their breasts in front of him.Cúchulainn averted his eyes, and the Ulstermen were able to wrestle him into a barrel of cold water, which exploded from the heat of his body.They put him in a second barrel, and the water boiled; and finally a third barrel, which merely warmed up to a pleasant temperature.Her affair with Áed, Conchobar's poet, led to the death of Lóegaire Búadach.The Ulstermen took her life, out of the love of her, though they seldom engaged in femicide.
p.23 [SEP] Knowledge 2: Conchobar mac Nessa
Conchobar mac Nessa (son of Ness) is the king of Ulster in the Ulster Cycle of Irish mythology.He rules from Emain Macha (Navan Fort, near Armagh).He is usually said to be the son of the High King Fachtna Fáthach, although in some stories his father is the druid Cathbad, and he is usually known by his matronymic, "mac Nessa": his mother is Ness, daughter of Eochaid Sálbuide, King of Ulster.
Knowledge 1: Mugain
Mugain, daughter of Eochaid Feidlech,  , is a legendary queen in the Ulster Cycle of Irish mythology; characterized as the "Strumpet wife of Conchobar mac Nessa", the king of Ulster.Also styled Mumain, she bore him a son named Glaisne.She was also a sister of Medb by paternity.Her epithet, "Aitinchairchech", literally means "having gorse-like body hair", or perhaps more specifically pubic hair.When Cúchulainn returned to Emain Macha after his first foray, his fury was so great the Ulstermen feared he would destroy them.Mugain led her maidens out, and they bared their breasts in front of him.Cúchulainn averted his eyes, and the Ulstermen were able to wrestle him into a barrel of cold water, which exploded from the heat of his body.They put him in a second barrel, and the water boiled; and finally a third barrel, which merely warmed up to a pleasant temperature.Her affair with Áed, Conchobar's poet, led to the death of Lóegaire Búadach.The Ulstermen took her life, out of the love of her, though they seldom engaged in femicide.
p.23 [SEP] Knowledge 2: Vera Miletić
Vera Miletić (Serbian Cyrillic: Вера Милетић; 8 March 1920 – 7 September 1944) was a Serbian student and soldier.She was notable for being the mother of Mira Marković, posthumously making her the mother-in-law of Serbian president Slobodan Milošević.
Knowledge 1: Vera Miletić
Vera Miletić (Serbian Cyrillic: Вера Милетић; 8 March 1920 – 7 September 1944) was a Serbian student and soldier.She was notable for being the mother of Mira Marković, posthumously making her the mother-in-law of Serbian president Slobodan Milošević. [SEP] Knowledge 2: Maria Thins
Maria Thins( c. 1593 – 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family.

Answer: Ness