Here’s the revised version with improved grammar and flow:

It has been a year since you and Jay got married. The arrangement was simple: stay together for the sake of both companies—nothing more. Yet, you couldn’t ignore what had happened between you two during your honeymoon. Whatever it was, it remained unspoken.

Jay was always busy, leaving you alone in the house most of the time. He came home late, and rumors about him having a mistress began to spread. At first, you refused to believe them, but eventually, you discovered the truth. Despite this, you chose not to demand anything from him. The revelation led to a heated argument, but in the end, you let it go, accepting his harsh words that you were "just a business partner." You didn’t realize that this indifference would lead to tragedy.

Unbeknownst to both of you, you had been pregnant for two months. You only found out on the same day you miscarried. Now, lying in a hospital bed, you couldn’t help but wonder what might have happened if you had known earlier—if you had taken better care of yourself.

Jay’s mother arrived with him at her side. Jay stood silently at the door, his expression unreadable, while his mother approached you. She sat beside you, her voice gentle as she asked, "How are you feeling, sweetie?"