My other half isn't much of a gamer but she has my old low end laptop and wants a co-op game that we can play together. We've previously played Minecraft together but nothing else, she just wants something we can play together.
Any good recommendations that are cheap and not graphic intensive?
Super Indie Karts: https://store.steampowered.com/app/323670/Super_Indie_Karts/
Starbound: https://store.steampowered.com/app/211820/Starbound/
Starbound's multiplayer is connecting via IP address. Should be simple enough.
If she's into games like Stardew Valley and The Sims, she should like Starbound. It has farming, building a city (or cities), getting people to populate your town, terraforming planets, vehicles, space travel, and emergent quests, with some Mario-style platforming, and Terraria-style exploration/crafting.