"How could he have hacked into my account? He's not even here."

Who knows, like you said he's an IT. He's also been in your house multiple times. She could blame you for invading her privacy, so don't admit to anything don't even bring it up for now.

"I do not know if he's done this in purpose but he changed my password and an email was sent to my alternative email. It says that this person with this mobile number was deleted from my account. The mobile number is OM's.

This confirms it. I printed out this evidence."

Imo, don't do anything right now until you talk to your L with your evidence.

me40; W43
M18; T~20
D18; S13 & S3
bomb 5/9/11
EA busted 4/30/12; 9/4/12; 4/29/13; 6/10/13 same OM

Separated 4/1/14

"Even a flicker of light will shine through darkness-12/25/2012"....better days ahead.