Games like Online Wife
Games like Online Wife include Slime Rancher 2, Unpacking, Mirror 2: Project X, your wife, and Chill with You : Lo-Fi Story. We matched them by the tags players give Online Wife on Steam (Casual, Indie, 3D, Simulation, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Slime Rancher 2
Shared: Cute · Relaxing · Casual

Unpacking
Shared: Casual · Cute · Relaxing

Mirror 2: Project X
Shared: 3D · Female Protagonist · Anime

your wife
Shared: Casual · Cute · Anime

Chill with You : Lo-Fi Story
Shared: Casual · Relaxing · Anime

Volcano Princess
Shared: Female Protagonist · Simulation · Anime

Muse Dash
Shared: Anime · Casual · Female Protagonist

Desktop Kanojo
Shared: Casual · Anime · Simulation

Chinese Parents
Shared: Casual · Simulation · Indie

Calico
Shared: Casual · Indie · Cute

STORY OF SEASONS: Friends of Mineral Town
Shared: Casual · Simulation · Cute

The NOexistenceN of Lilith
Shared: Casual · Simulation · Anime

Assemble with Care
Shared: Casual · Indie · Female Protagonist

Tricolour Lovestory
Shared: Casual · Simulation · Anime

Sticky Business
Shared: Casual · Simulation · Indie

PowerWash Simulator
Shared: Casual · Simulation · 3D

Pretty Neko
Shared: Casual · Indie · Simulation

Mountain
Shared: Indie · Casual · Simulation

Your Mom
Shared: Casual · Simulation · Anime

Passpartout: The Starving Artist
Shared: Casual · Indie · Simulation

Leaf it Alone
Shared: Casual · Simulation · Relaxing

House Flipper
Shared: Simulation · Casual · Singleplayer

Placid Plastic Duck Simulator
Shared: Casual · Cute · 3D

Florence
Shared: Casual · Indie · Female Protagonist