But... Moooom, dad is being a d*ck

THOSE kids are not Magento's kids. Those are the children of Sokovian parents who were killed during a bloody war. Watch the movie, "you uncultured swine".

That's because of the rights issue. In reality, magneto has twin children, quick silver and scarlet witch. LEARN TO READ YOU ILITERATE SWINE!

In the comics, yes, he is the father of the twins. But those are the twins from Avengers: Age of Ultron and that is Magento from the current line-up of X-Men, who is hinted at being the father of Quicksilver from X-Men: Days of Futures Past. Think before posting, you *illiterate* swine.

The twins of the avengers are the same x men twins. The problem is that Sony owns x men you uncultured swine

*Ahem* 20th Century Fox owns the movie rights to X-Men and mutant-related story lines, you blah, blah, blah.

Nope. Sony owns it. Screenrant is outdated, but you didn't read that, you illiterate swine

"The X-Men film series consists of superhero films based on the Marvel Comics superhero team of the same name. 20th CENTURY FOX obtained the film rights to the characters in 1994, and after numerous drafts, Bryan Singer was hired to direct X-Men (2000) and its sequel, X2 (2003). Singer left the potential third and fourth films, leaving Brett Ratner to direct X-Men: The Last Stand (2006)." -From the X-Men (film series) web page on Wikipedia
Sony owns the film rights to Spider-Man and related characters and stories.

Sony and Marvel Studios reached an agreement to bring Spider-Man into the Marvel Cinematic Universe. 20th Century Fox and Marvel Studios settled on Quicksilver's origins, Fox getting the mutant back story and hinted parentage while Marvel gets the name and his sister.

Apparently, their original origin wasn't Magento's children, and to fit within the MCU, they actually brought that original origin back recently.
http://nerdist.com/comics-relief-scarlet-witch-quicksilvers-new-old-origin-the-x-men-leave-earth-more/

Interesting. I learn something new every day. Thank you, jes5890!