Is What Happened To Billy'S Sister On Young Sheldon Ever Revealed?

When I get married to Zachary Lennor, I know that he has a younger, depressed sister who's a huge pain in the ass. On our wedding night, she suddenly barges into our room with the excuse that she's terrified of the dark. That's why she wants Zachary to sleep with her. When I get hospitalized due to my illness and need Zachary to take care of me, his sister insists that he go home to eat all three meals with her every day. Otherwise, she'll go on a hunger strike. Even when Zachary and I are on a date, his sister will call him immediately, claiming that her depression is acting up. If he doesn't go home right away, she will jump off a building without hesitation. Unable to take it anymore, I unleash my anger on Zachary's sister. But Zachary is quick to shield her from my ire. With an icy expression, he tells me, "I only have one sister, whereas I can always get myself another wife. If you can't stomach her presence at all, we'll get a divorce right now." I keep tossing and turning in bed at night, unable to sleep at all. That's when I decide to get out of bed just so I can apologize to Zachary and his sister. As soon as I walk to the doorway, I hear a familiar voice whining from the master suite, where Zachary stays. "Zach, since Samantha got so mad at me today, does this mean she's found out that I'm not your actual sister at all, but your ex-wife?" Zachary pauses momentarily before saying reassuringly, "Even if she does, it's fine. Although I do love her, I've already vowed to stay with you forever the day I married you. "So, even though we're already divorced, I will still keep my word. I won't let you go." At that moment, I finally realize that Zachary's so-called younger sister is just a fake identity. Her depression is also a big fat lie. I'm the only one who's been kept in the dark about everything in this performance. In that case, I'm not going to humor these jerks anymore.

My little sister Willa? Always played the noble princess—even during the freaking apocalypse. She was pregnant and still trying to look like some graceful queen. I told her to end it. Safer that way. She slapped me. "Shut up. How can you be so heartless?" Meanwhile, I skipped meals so she and her rescue-pet gang could eat. When I collapsed from hunger, she snorted. "Drama queen. Think of it as a free weight-loss plan." I dragged her to the base, the safe zone, and nearly died doing it. She snatched the last of my rations. "The baby and I are good. Give the rest away." I died from my injuries—frozen, starving, forgotten. Willa? She got crowned a saint. Even landed the baby daddy—the Deputy Governor—and kicked off her perfect little fairytale. Then I woke up. Back to the moment she asked me to swear I'd protect her and the baby. This time, I laughed in her face. "Die for all I care."

My younger sister, Lila James, had a heart attack. The doctors tried their best, but she died. On the day we buried her, the men she had been involved with showed up. One was an unhinged lawyer, and another one was a powerful heir from Jovaris. Yet another one was a messed-up top celebrity. When they heard that Lila was dead, they lost it. They tried to dig her out and torture her. I blocked their way and begged them, “She’s gone! If you need someone to blame, take it out on me!” That was the moment I became Lila’s stand-in. They tortured me in every way they could think of. They beat me until my skin tore open and forced me to film humiliating videos. I somehow escaped and tried to bring them to justice. The unhinged lawyer threatened to ruin my life! The powerful heir used his influence to shut every door in my face. The messed-up top celebrity leaked the videos and claimed I had seduced him. I became the center of a national scandal, and my reputation was irreparably damaged. My parents even published a statement and cut all ties with me. I went home to confront them. When I reached outside their door, I heard Lila’s voice. She sounded immensely pleased. “Mom, Dad, your plan to fake my death saved me! I can finally get away from those lunatics. “Good thing we had Yara! Otherwise, I would’ve been the one in all these scandals.” I broke down. I rushed into the house. I was ready to drag Lila to hell with me, but my parents killed me first. When I opened my eyes again, I was back on the day Lila had her heart attack.

Silver burned. Holy light seared. I screamed my brother’s name, Theron, into the communication crystal. My consciousness was fading. His cold voice finally crackled through. "What now?" I fought through the pain, my voice weak. "Theron, please… help me…" He cut me off, his voice a razor's edge. "Enough! Lilith is hosting the Blood Moon Festival. Stop causing trouble. If you’re tormenting her out of jealousy again, I’ll throw you in the sun cells myself." The line went dead. Lilith. Our manipulative little adoptive sister. Was she really more important to him than his own blood? The silver poison and searing light consumed me. I shattered. My tears turned to ash, my body right behind them. Congratulations, Theron. You're free of your annoying sister. You don't have to lock me up anymore. Because I'm already dead.

Seven years ago, I swap my heart with Orion Gifford, the cyborg replica of me that my sister, Mildred Gifford, creates. However, my heart frequently gives him chest pains because of organ rejection. Mildred blames everything on me. She believes I have hidden a preexisting heart condition and have given away a defective human heart in exchange for a mechanical heart worth millions. So, she sues me for fraud and sends me a court summons. But on the day of the hearing, I don't show up. To force me out of hiding, she publicly announces to the media that she is officially taking Orion as her younger brother and leaving all her assets to him. When I still fail to appear, Mildred loses her patience and goes to the workplace address I leave behind. She steps into a sketchy factory and grabs a random worker to ask, "Do you know Zachary Gifford?" My factory supervisor, Greg Mathews, stares at her in shock and says, "Zachary? He died three years ago from sudden cardiac arrest. It was awful! His body got pulled into one of the machines. There was basically nothing left of him."

After fifteen years away, I was finally brought back to the DeLuca family. I thought I was returning to my real home. Instead, I walked into a house where the adopted daughter wanted me dead, my father treated me like a burden, and my brothers would rather watch me bleed than make her cry. On my first day back, she set dogs on me. That night, I was dragged to the top of the observatory and forced to apologize to her. When I fell from the tower covered in blood, they still called me a liar. Because in the DeLuca family, I may have been the real daughter by blood— but she was the daughter they loved. She thought she could bully me, poison me, and freeze me to death without consequence. She was wrong. Because the night I nearly died, my mother finally chose me—and turned a gun on the whole DeLuca family.