The first, and only to date (hic!) time my wife had black cock was when my old university friend, Edwin, who happens to be black, took her white only virgin pussy! We have posted about this in the Interracial Story Section on this site. My wife never ever swallowed my cum, she did however swallow Edwin's, then she continued to lick his cock clean of every last droplet it could muster! She did this during several subsequent episodes during the course of events with him! She really does like sucking cock ... more so now than prior to getting blackened ... just that now ... blacker the better!
I later complained to her about this and her response was simply; "Edwin was blowing bigger loads than you did! Besides, his cum tasted better and he made me a lot more horny than you did when I was giving you a blow job!"
Some days you just can't win, eh?