Betrayed Bride: Choosing My Ex-Fiancé's Brother

I'm about to get married, and yet my boyfriend, Samuel Sutton, whom I've loved for many years, has no idea about my marriage. He's infatuated with Summer Wright, an underprivileged student whom I've been sponsoring. So, he decides to throw a party for her. Before leaving for the party, Samuel scoots near me purposefully to murmur into my ear. "I'll give you the title as my wife, but I intend to give my body to the woman I actually love. Tonight, Summer and I will stay in the same room. As for you, you shall spend the night with that cold-faced bastard!" Only then do I realize that Samuel has been reborn as well. After all, in the previous life, I was the woman he had married. On top of that, he also told me that he would only love me and me only. But when I was on my deathbed, I finally found out that Samuel had been yearning for Summer the whole time. Naturally, he hated my guts for the rest of his life. That's why the first thing I do after I get reborn is switch my marriage alliance partner to Samuel's older brother, Liam Sutton.