i was just having a normal day and when i got home to go to bed my wife was standing in the bed and at the same time sleeping in the bed this is 1.7.10 by the way and it was wierd kill one of hers :/

What version of MCA were you using?

Probably a glitch or something, or maybe a witch came in your house and created a twin of your wife 0.0

Yup, it could be just a glitch.

Probably

Closing as no further info was provided.