bbc training

#1
I want my wife to try big black cocks. i am only 4 inchs hard. and she has issues taking me. she is really tight. i would give almost anything to see her turned bbc slut. any thoughts on how to train her pussy for bigger. she isn't much for dildos. but i do have bbc dildos. she can't take them and if she does, feels they are uncomfortable and unpleasurable.
 
#2
I want my wife to try big black cocks. i am only 4 inchs hard. and she has issues taking me. she is really tight. i would give almost anything to see her turned bbc slut. any thoughts on how to train her pussy for bigger. she isn't much for dildos. but i do have bbc dildos. she can't take them and if she does, feels they are uncomfortable and unpleasurable.
Seems to be something missing from your post......no mention at all of what SHE wants?