Is Alli jealous of Cody and Gigi?

Cody Simpson used to take his little sis Alli to Hollywood events, but now that he's a bit older, there's another blonde on his arm- his GF, Gigi Hadid! So, is Alli jealous that she doesn't have as much time with her bro? "Alli and Gigi are good friends," Cody tells J-14. "They go to the gym sometimes." Gigi and Cody's mom have a strong relationship, too! "We've gone shopping," Angie Simpson says. Whew, no problems here!