Kate Gosselin celebrated her sextuplets' 6th birthday Sunday with a pool party -- in 47-degree weather!
A source tells UsMagazine.com the in-ground pool behind the Gosselins' $1.1 million Pennsylvania home is heated and connected to a hot tub.
PHOTOS: Kate's hair through the years
Kate, 35, was spotted running from the pool area into the house with water dripping off her. (She may have been having more fun than her 2009 trip to North Carolina, in which she yelled at her twins for splashing her, and one snapped back, "Mommy, you are mean!")
PHOTOS: The Gosselin family album
Alexis, Hannah, Aaden, Collin, Leah and Joel -- who actually turn six Monday -- may soon have new playmates: Tony Dovolani's 20-month-old twins, Adrian and Ariana, and daughter, Luana. 4.
"Her kids and my kids will probably get along famously," Dovolani told Us at the 17th annual Race to Erase MS event in L.A. last Friday of his former Dancing With the Stars partner. "This is something we're planning... Her kids are adorable!"
And even though sources told Us he couldn't "wait to get rid of Kate," Dovolani said diplomatically, "She really did have a lot of laughs. I know you guys didn't see it on TV, but we really did get along."
VIDEO: Kate's most disastrous dancing moments
"She misses dancing and that makes me happy," added Dovolani of Kate, who will return to the show’s season finale on May 24 and 25.