Oliveira required surgery after last Saturday's match and a gruesome photo showed the extent of his injuries.
There was a huge gash above his left eye and another across his nose, which was suspected to have been broken in the clash.
Mings – who was previously hit with a ban for stamping on Zlatan Ibrahimovic and is at Villa on loan from Bournemouth – was quick to apologise for the incident.
But in a message accompanying a photo showing her holding her husband's hand from his hospital bed, Oliveira's wife Mel demanded Mings be charged.
She wrote: "Just want to say that Nelson is much better and he will come home tomorrow.
"It was a sad day for us and I hope someone will appeal for this guy [to] get a lengthy ban!
"There's absolutely no excuse for his behaviour.
"He knew where his head was.
"Any injury is upsetting but something like this is just disgusting.
"I hope something will happen, he can't get away with that! He's got previous!"
Oliveira himself posted a selfie showing how he is recovering as he thanked hospital staff for treating him.
He wrote: "Finally at home… I want to thank the entire medical team at @readingfc and the Royal Berkshire Hospital who helped me brilliantly during these tough days, I have no words to say how grateful I am.
"Thank you to all the people who sent me messages sharing love and support that will definitely help me get back even stronger!
"A special thank you to my lovely and beautiful wife @melrodrigues22 for always stand by my side in every moments. See you soon."
Angry Reading boss Jose Gomes sought an explanation from referee Geoff Eltringham and his colleagues after the game, which finished 0-0.
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