On Our Wedding Night, I Cured the God of War Prince

Yan Xige transmigrates, and from the start her father doesn't care for her, her mother is dead, and her stepmother goes out of her way to bully her.

Luckily, she's a modern medical doctorate with a portable medicine dimension.

Hmph! This young lady isn't someone you can push around!

She disciplines her stepmother, face-slaps her half-sister, and marries into the Prince Regent's household.

What? Her husband, Jun Tianqing, is actually a sickly invalid?

And the emperor is trying to have him assassinated?

On their wedding night:

Jun Tianqing: “Tell me, are you the emperor's spy?”

Yan Xige denies it three times over: “I'm not. I didn't. Don't make things up.”

Jun Tianqing: “Cough, cough, cough...”

Yan Xige: “I've got medicine. Take it, then hurry up and go to sleep.”