Help me please

Im 24 my wife is 25 and I'm desperate to see her fuck a bbc, my tiny white dick is useless and I want to see her stretched and fucked like never before, I know my goddess deserves a real cock but how do I get her to agree? I've mentioned it in joking and she changes subject or says why would she as she married me! Help me with any suggestions
Buy her a black dildo... Watch ur porn.... Make up a ...make believe playmate called man... He can be big n black and watch ass she becomes a bbc slut
Nice ideas I just want her to use me to clean her tight pussy after, I put a ring on her finger but now it symbolises she is free to fuk bbc only, my tiny dick deserves no pleasure and all bbc must be bareback