Almost 4 & stealing baby sisters binky’s😅

Josie • Cosmetologist ✂ Nature lover🌲🌻 NLB♡ Matix Roy💙Sienna Colleen🌸 & baby due May 20th

My son will be 4 nov 11. And has been off the binky since he was 2. Now that his sister has one he takes hers and throws the biggest fits if i take it away. Like blood curdling horrifying fits. Obviously he can’t have a binky. And I’m pregnant with #3 so binkys aren’t really going anywhere anytime soon. Does anyone have any good ideas on how I can fix this