World Exclusive: Inside Jamie Lynn's Baby Shower!

With Britney Spears embroiled in a seemingly neverending custody battle and 17-year-old sis Jamie Lynn Spears expecting her first child very soon, it's hard to imagine a family under more scrutiny these days than the Spears clan.

But in spite of all the outside pressure on them, it was nothing but good times for the Spears sisters when they reunited on May 2 for the Zoey 101 star's baby shower.

"It was wonderful to be able to spend time with her and just be girls again," Jamie Lynn told OK! in an exclusive interview about seeing her sister for the first time in months. "We painted our nails and did stupid stuff."

Even better, explains Jamie Lynn, was that she was able to have some one-on-one time with Brit: "To be able to be in the privacy of our own home and just be sisters again was wonderful."

Mother-of-two Britney even shared some words of wisdom with her pregnant sibling. "She told me, 'There are going to be some long nights, but it is completely worth it,'" Jamie Lynn recalls to OK!.

As for whether or not the pop superstar will make it back home to Louisiana when Jamie Lynn has the baby, the teen star tells OK!, "Nothing is set in stone, but that would be wonderful. I'd love to have her here for that, but you can't plan that far ahead."

Even if Brit isn't there in person for her younger sister, the two are in almost-constant contact, says Jamie Lynn.

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(Britney, Jamie Lynn, Lynne Spears, Casey's sister Ashley Aldridge and his mom Joyce Aldridge at the May 2 shower)

For the complete interview and all the exclusive photos and details from baby shower, be sure to pick up the new issue of OK! — on sale everywhere Thursday.