Adele's Las Vegas residency at the Colosseum at Caesars Palace has been a hot topic among fans, especially after local newscasters reported on March 15 that the 34-year-old singer might extend her Sin City run.

Having already received an estimated $240 million upfront for her five-month gig, the extension could prove very profitable. However, this success has fueled tension over her prenuptial agreement with fiancé Rich Paul.

"It's a touchy subject: Adele has a few trust issues, which is normal for her, but bringing up a marital contract caused some friction between them," reveals an insider.

Adele reportedly sees discussing money as a romance killer, but the couple's arguments over the matter have only raised more red flags.

With her net worth estimated at an impressive $220 million, Adele has a lot to protect. Her music and tour sales, real estate portfolio, and the $58 million mansion she and Rich moved into last year all contribute to her fortune. Rich, a top sports agent with clients like LeBron James, has an estimated net worth of $120 million himself. Yet, some friends worry he might be using Adele for fame.

Despite Adele's doubts, her pals have convinced her to secure an ironclad prenup. This is especially important given that she apparently didn't have one with ex-husband Simon Konecki, whose divorce settlement didn't include alimony.

An insider shares, "Now she just wants to play it safe. A prenup's signed, and Adele and Rich put it behind them... hopefully."