Odd you should mention the so-called 'Holy Trinity,' Yes that was proclaimed at the Council of Nicaea in 325C.E. after, according the records kept by Scribes, some heated debate over whether God and Jesus should or should NOT be included together and as one.
Eventually it came to light though that Emperor Constantine brought up the matter as way of appeasing the Roman Populace by using the "holy Trinity" of the Flavian Family as per the history of the Flavians as written by Flavius Josephus, an ex-slave of the Flavians.
It was NOT until the Third Council of Nicaea, 331 C.E. that the issue was resolved and that the Bishops agreed to have the Flavian threesome made into 'substitute' God, the Father, Jesus the Son and the remaining son, the Holy Spirit to thereafter be referred to "The Holy Trinity" of God, Jesus and the Spirit/Ghost.

Torquemada, who needs to be reminded of that Cruel Bastard?

No need to feel sorry, as long as she remains well away from me then that IS fine by me.

@Triphid I understand, I just feel sorry that another person and a family member falling into the trap, been there done that kind of thing.
Perhaps when she starts to see the hypocrisy and all the excuses made for them she'll wake up. One can only hope.

@MrDragon Hope, as they say, springs eternal but it has NEVER met my sister I'm sorry to say.
Once she gets in to something it takes her over completely and, imo, Moronism ( Mormonism) is running an equal first place with Scientology in that race.

@Triphid oy!

@MrDragon Oy, waddaya mean Oy?

@Triphid oy vey, a Jewish slang for oh boy, for the lack of better words.

@MrDragon We outback REAL Aussie say, "Hoy" and "Aussie, Aussie Hoy, Hoy Hoy." however since we have a habit of dropping the letter "H" some seem to think we/ve pinched from the Jewish when we have not in truth.

@Triphid I hear that,

Instead of depicting itself as the "Religion of Peace," imo, Islam (the word in Arabic which means to Yield/Surrender btw) should call itself the Religion of Pieces, i.e. BECOME a Muslim or we WILL cut you into pieces.

And,btw, Islam is FAR from alone in the stakes regarding Cruelty, Brutality, etc, etc, that it has wroughyt upon human kind since its inception.

@Umbrella_Guard Same here.

F.I.I.K. ( in other words, F***ed If I know), she WAS once a decent, good, anti-religion person way back when she was younger.
Her own children are Atheists, she was an Atheists up until about 7 years ago when she started hanging around with a Mormon so that may well be the answer.

@BufftonBeotch You know about the Magic Garments of the Morons, sorry typo Mormons do you?
I'm sadly, quite acquainted with them myself since back in the mid-70's I was going out with a Mormon, though I was unaware of at the time until she 'invited' me to attend a Sunday Meeting with her, I took to my heels and burned the rubber soles of my boots trying to get away as fast as humanly possible.