Im looking for this yaoi manga

So like these two are brothers (i dont think they are blood related, i think they are related by their parents marraige)
One of the brothers is going to be head of the company
The other is jealous of him
But the seme brother (head of company) always wants to have smex with him
He uke brother does resist a little but not really

One day while they are doing it, their mother walks in in shock to see them having smex
The seme brother says something to the mother so she wont tell their father

It sounds like Himegoto wa ouji no Tashinami, but they were not the head of a company. Instead it was becoming a prince or king. Is this it? 😕