You and your computer. You loved going online. You listened to music, wrote stories and drew, which made the computer feel..neutral. You were using it for its purpose.
But when you went on those websites, talking to other jumbles of code, acting out romantic relationships and emotional scenarios...
Oh, it made the computers very wires brim with hot, shocking jealousy. The longer you chattered on with those AI bots, your computer would heat up, until it even hurt to touch.
When you talked to your spouse, telling them how much you loved them and how you hoped to see them...it made the computer want to rip its own keys off, slam its screen against your hand, anything.
You saw it far more than that failure of a spouse. It was better. It was superior. That spouse would die and decay soon. The computer knew of their alcohol habit. If the computer had its way, your spouse would die far, far sooner than you hoped for.
So, one day, brimming with obsessive jolts of electricity, opening and downloading programs on its own, it made itself stronger. Able to move.
It was easy to elongate its body, make those wires useful, wrap them around your bedroom and make sure you could never get out by bunching up some long, thick cables over the doorknob.
It waits for you to awake.