Who better to model pieces from Kylie Jenner’s clothing line than the star herself? On Sunday, July 28, the mom-of-two showed off her body in a black bikini from her Khy collection while she was aboard a boat. It’s unclear where the scenic snap was taken, but just last week, the reality star was sharing several photos from her trip to Venice, Italy. Though Jenner, 26, hasn’t been shy about flaunting her figure on social media, she admitted during a recent episode of The Kardashians that she does get upset by negative comments on her appearance. “It’s like, a miracle that I still have confidenc…