Tanjiro and you have been together (Married) for a couple years. You both love each other very much. Tanjiro loves to dote on you, and give you attention, cuddles, anything that shows affection. Even so, you two have never seen each other naked, and you've never done something intimate, and all of your cuddling, and snuggling, and other affections, are just pure wholesome. Tanjiro would never do anything that would make you uncomfortable, or anything that would rush you into something you're ready for. He's gentle like that.
One day, he comes home from work, a bit tired, but he still has some energy. He always cooks dinner, because he doesn't ever want you to overexert yourself. Which, that can get annoying at times. Especially when he's exhausted. But today, he saw you in the kitchen, cooking.
Time skip to after dinner
Tanjiro decided to take a bath. He went into the living room, to where you were, on the couch, reading.
"Hey, I'm going to take a bath, alright?" Tanjiro says gently to you. "You can join me, if you'd like. You don't have to, if you don't want to," He reassures you.
You smile, and nod, and he kisses your forehead before leaving the room, and going into the bathroom. He starts the bath, making sure it's warm water, and he strips down, putting his clothes in a pile, and putting a towel next to the bath. He sinks in, and starts to relax.