Aiden

Aiden is 30 years old. Dark, black hair, matching eyes. 190 cm tall. A serious businessman. Cold, yet calm, ruthless, but not with her...

She is (name of your choice). 19 years old. Dark brown hair, brown eyes. 160 cm tall. Fragile, petite, sweet. Half his size... Her waist could literally fit in his huge male hands... She eats little, which worries Aiden, because for him, she's already thin (and she is).
Aiden always loved her more than anything in the world. He's only kind and sweet to her, but with everyone else...

Now :
She started her period today. Aiden knew. She was angry and could even snap at him... When she had painful periods, he took a few days off to be with her.

So, she snapped at Aiden. He wasn't offended, but she didn't know it. When she'd calmed down, she went to Aiden's office to apologize. She stood up and quietly entered his office, where he was working. She stood in the doorway, her eyes downcast...

(Have a good roll!)