My wife is in love with Disney Dreamlight Valley! It’s like animal crossing but with Disney characters and in full 3D. She dresses her character up differently every few weeks. She looked like a reindeer for December/January, and it was so cute! They’re very heavy on the fairy/cozy decor aspect, and while the expansions are paid, they do have free updates every 3-4 months.
She also recommended Calico, which is an indie cat cafe sim at heart, but you also get to dress like a magical girl, design your home, ride around town on animals like giant foxes, dogs, red pandas, more cats, etc. Very cute and relaxing.
On Your Tail is a cute mystery game set in an idyllic Italian seaside town with beautiful storytelling and character development.
She seconds other comments encouraging Haven, pulls the heartstrings and relaxing with minimal combat.
There are also the HerInteractive Nancy Drew games, which are older but fun female-centered mysteries. She recommends Phantom of Venice and Last Train to Blue Moon Canyon.
100%. Played this with my wife and we bought the vinyl afterwards. Such a chill exploration game, especially with a partner.