My wife has been peeking at me from around corners and behind furniture. It's gone from weird to terrifying

Straight away - I love my wife. We’ve been together for nearly ten years and are deeply in love. She’s kind, well-adjusted, intelligent, and generous. Neither of us has any mental or physical health problems. Neither of us has any problems. Things are good, and they’re unapologetically cliche. Perhaps that’s why this is so strange.<br><br>We started going to therapy as a couple last month, and she denied it was happening when I brought it up. That was three sessions ago, and I was starting to wonder if I really was imagining it.<br><br>It starts with small, fleeting glimpses - the flicker of movement out of the corner of my eye, vanishing as soon as I turn to look. The first time I saw her, she was peeking at me from around a door frame. She was just far enough back that I couldn’t see anything except her eyes and a tuft of her hair. When she saw me look she scampered backward. I laughed about it, thinking it was cute. She didn’t respond when I called after her.<br><br>The next day I saw her hiding behind the submerged end of the bath after I’d climbed in to take a shower. At first, I thought it was my cat. In fact it *was* my cat - I heard her hiss, jump from the water, and scurry backward. I even saw her dart out of the bath when she thought I wasn’t looking, but when she turned to scurry out I saw it was my wife.<br><br>Again, she was only a few inches from the water, in the empty end of the tub beyond my feet. Her eyes were pitched up to look at me, her nose breaking the surface of the water. It was so strange. I stayed frozen, thinking it was some new game she was playing, hoping that she’d go back to normal when whatever had spooked her had passed. I called her name, but she didn’t respond. The water from the faucet was too loud, I figured, so I reached down and put a hand over her mouth to get her attention. She wasn’t there.<br><br>The next week I saw her hiding behind the garden wall, peeking over the edge to watch me mowing the lawn. This time when she saw me catch her, she just turned and ran. I chased after her, but she’d gotten too big of a head start. I caught the front door before it closed, but she was already up the stairs. When I reached the bedroom she was nowhere to be seen. In retrospect, I should have gone looking for her, pushed the issue. I was still under the impression that it was some sort of game or joke. I thought she’d eventually wander back out and things would go back to normal.<br><br>They didn’t. I saw her again that night, hiding in a sunken impression in the shadow of the bed. Her eyes were staring low on my body, and I could see the faint glint of teeth as she parted her lips. This was the first time I was afraid. It was so *alien,* seeing my wife act this way. I called her name, softly, and she scampered backward. This time I heard her scuttling, the sound of her clothes catching on the carpet as she moved.<br><br>The next morning I convinced myself I dreamed it. That is, until I saw her out of the window while making coffee, hiding behind the stone pedestal that supported the garage door. Based on the angle and position of her body, I figured she was laying on the ground and peeking over the edge of the concrete.<br><br>The last time I saw her it had rained. I was standing in the kitchen again, looking out at the puddles on the concrete apron of the garage. She poked her head out from beneath the eaves of the roof, just above the downspout, and watched me. This time she didn’t run when I saw her. She just kept staring. Eventually, her eyes flickered and she was gone. It was like she was a normal person for a heartbeat or two. Like whatever briefly possessed her was gone, and it was my wife again. She was back to normal in an instant, and when she came inside she acted as if nothing had happened.<br><br>I’d convinced myself over the past month that I’d been imagining it all, until my wife came to me on new-years day and said she wanted to go to therapy. She was starting to feel like something was hiding in her house, watching her from around every corner.