Kim Kardashian loves being an aunt to 5-month-old Mason, but she draws the line at public breastfeeding.
"EWW Im at lunch,the woman at the table next 2 me is breast feeding her baby w no coverup," she Twittered Friday.
PHOTOS: See how Mason has grown!
Further disgusting the E! reality star, 29?
"Then [she] puts baby on the table and changes her diaper," Kim -- who flew to Philadelphia Saturday morning -- lamented.
VIDEO: Khloe and Kourtney get in an ugly catfight
Kim may have another new niece of nephew soon. In a segment of Talk Stoop shot June 9 in Brooklyn, NY, Khloe, 25, says she's "not pregnant... one day soon, but not at the moment." (She cheered on her husband Lamar Odom to a Lakers championship Thursday night.)
In the same interview, Kourtney, 31, admits she has mixed feelings about putting her baby boy (with on-again beau Scott Disick) on television.
"[Sometimes I think], 'My son has to be on TV, I hate my life,'" she says. "But I love it because I don't have to go to an office. I get to have him with me everywhere."