Justin Bieber's mother, Pattie Mallette, had to clarify that her son and daughter-in-law, Hailey Bieber, are not expecting twins after inadvertently sparking rumors with her comment on a social media post. The speculation began when Mallette responded to a repost of the couple's maternity photo shoot by Hailey's father, Stephen Baldwin, writing, "Congratulations Grandpa! WE ARE GONNA HAVE THE CUTEST GRAND-BABIES EVER!"

The pluralization of "grand-babies" sent Beliebers into a frenzy, prompting Mallette to clarify that Hailey, 27, is pregnant with just one child. "No not twins lol I wish," she wrote on the post. "I just mean in general. Hopefully they will have more than one eventually. They will make beautiful babies whenever they have them. One is enough for now."

Mallette, 49, couldn't contain her excitement after having waited "for this day," expressing her joy in an earlier post, "Oh my gosh, I'm going to be a grandma. Oh my goodness!" The "Baby" singer, 30, and his wife announced their pregnancy on May 9, sharing sweet images of their vow renewal ceremony in Hawaii, with Hailey's baby bump stealing the show in her white lace Saint Laurent dress.

Sources told TMZ that Hailey is already in her third trimester, indicating that a Bieber baby could arrive by late summer. It has also been reported that the couple has already chosen a name they consider "perfect" and are starting to decorate a nursery in anticipation of their first child's arrival.

Friends, family, and fans have been quick to share their excitement about the news, with Hailey's uncle Billy Baldwin telling PEOPLE that he is "excited" about his niece and nephew-in-law's growing family. Even Justin's ex-girlfriend, Sofia Richie Grainge, who dated the singer briefly in 2016, congratulated the couple on their pregnancy announcement, commenting with heart and love emojis, "Ahh!! Congratulations."

Sofia, 25, is also expecting her first child with husband Elliot Grainge and is currently nine months pregnant with a baby girl. She recently shared a sweet baby bump picture on social media, expressing her "9 months of bliss."

High-profile friends of the Biebers, including Kendall Jenner, Kim Kardashian, Paris Hilton, and Chrissy Teigen, also expressed their joy and congratulations on social media. Teigen, in particular, shared her excitement for Hailey, commenting, "EEEEEEEEEEEEEEEEEEEEEEEEE!!!!!! You are going to be an amazing amazing mommy oh boy get ready!!! So exciting so happy for you both!!"

A source close to the couple told PEOPLE that everyone is excited for them and that they will make great parents. The source also revealed that Justin is super involved and considers this the next important project for him, expressing his enthusiasm for raising his baby.