KAFARA

Dear Sir/Maam! Well there is an issue which i want to share is that i was talking to one of my friend during fast. I didn't masturbate but during call however i got some feelings and white fluid was ejected from my private thing.Like i dont use my hands or rub that thing. So my question is that did my Roza break or not ? or i have to go for kufara. Desperately Waiting for your reply.