Untouchable Lady is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

“Please, Hilise. Please die in place of Gabrielle.”
My always dignified brother begged me for the first time.
He wants me to die for our stepsister, whom we don’t even share a drop of blood with.
“For the first and last time, I ask you this.”
I’ve always been miserable, and there is no exception this time.
The seventh time that I was betrayed and killed, I was completely free of lingering feelings.
“I’m glad that you’re a scumbag until the end.”
I won’t be swayed by love anymore. It’s my turn to abandon them first.