Demi was shown chatting to Chloe and Charlie about his relationship woes with Ferne McCann and she said she felt like she has been "walking on eggshells" around her brother.
Chloe and Ferne had a massive fallout in Marbella after a video emerged of Ferne cuddling up to a mystery man in a pool in Las Vegas, and both girls are refusing to back down.
Ferne has apologised, after screaming at Chloe to "eat something", but Chloe isn't prepared to forgive her.
Last night, while at the opening of Charlie's Deli in Brentwood, it became clear that younger sister Demi is also unhappy about the current rift in her family.
"Whatever you do in life, we're going to stand up for you because you're our brother," she said. "If we die on our death bed, you're going to be at our funeral - do you know what I mean?"
We're not entirely sure what Demi means, but we're guessing she is siding with Charlie over Ferne!
Turning to Chloe, Demi then said: "I feel like I'm just walking on egg shells around this whole situation."
After the episode aired, Demi's TOWIE-star relatives were quick to congratulate her. Cousin Joey Essex tweeted: "Please give my cousin @Demi_Sims a follow .. It was her first appearance on #TOWIE tonight. @itv2 Well done Demi x."
Joey's sister Frankie, meanwhile, tweeted: "@Demi_Sims well done for last night Dem xxx love you little Demberlina xxx."
Before the show went out, Chloe had also tweeted: "Not long now... tonight #TOWIE 10pm ITV2 tune in, excited to see my baby sister Bam Bams aka @Demi_Sims' first appearance."
Demi was inundated with support following her debut and has definitely gained a fair few followers on Twitter. She has since said: "Getting the best tweets thank you."
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