Sunnats of nikaah

Dua to be recited by the newly wed spouses on the first night

Q: I would like to know about the prayer that the bridegroom and bride pray together after nikah and before consuming their marriage. How is it performed and why? I will be getting married soon and have heard about this from an old person and he has not been able to give me more details. All the others to whom I have asked, no one knows about it.

Having a simple nikaah

Q: With consent from my parents and siblings, and my husbands entire family (but not his father), I had my Nikkah in November last year. As soon as we announced to my father in law, he was over the moon and incredibly happy. Some realtives also knew about the nikaah beforehand as they arranged our marriage. The Nikaah was beautifully done at the mosque in front of witnesses and my mother and sister. After the Nikaah my parents announced it to other relatives and friends. I and my family received a lot of backlash.

My question is, Islamically did we do any wrong in keeping the nikaah discreet from noise and simplifying it as best as we could? I have received love from my in-laws and family members who were generally happy. Some relatives and family members may forever hold a grudge of some sort. For my own contentment, I wanted to ask if I did anything wrong or were there any mistakes in hiding it from certain family members?