Jessica Simpson Wedding 2014: Singer "Indecisive" About Wedding Venue

Jessica Simpson is reportedly having a hard time deciding where to get married.

With her wedding to fiance, Eric Johnson, less than one month away, Simpson is said to have become indecisive about her wedding locale, and while she has reportedly booked Santa Barbara's 78-acre Bacara Resort & Spa for her big day, sources say she may change her mind.

The venue is booked "for now," an insider revealed to Us Weekly on June 19. "But Jess keeps going back and forth on locales."

Simpson and Johnson began dating in May 2010 and got engaged six months later. On May 1, 20102, the couple welcomed their first child, daughter Maxwell Drew Johnson, and their second child, son Ace Knute Johnson, arrived on June 30, 2013. With the back-to-back births of their children, Simpson and Johnson were forced to postpone their wedding plans, but earlier this year, Simpson revealed that she and Johnson were finally planning to wed.

Also planning a summer wedding is Simpson's younger sister, Ashlee Simpson, who is set to marry her fiance, Evan Ross, on Aug. 31.

"Jessica and Ashlee are very close and really supportive with each other, especially since both weddings are coming up," a source told E! News earlier this week. "They have been doing lots of wedding stuff together. During this wedding process they both have been talking to each other about their ideas, even though they both are having very different weddings."

According to the E! source, Simpson is planning a "classic and modern" wedding, while sister Ashlee is aiming for a "Bohemian-style vibe."