Story title - man wants to see wife with big dick; swaps; she has an affair; he cause a MVA and wife dies

[TheAmbidextrousLeftHander]

What I can recall:

• Husband wants to see his wife with a big dick
• They swap with another couple
• Then, while he travels, she continues with an affair with the guy - almost gets caught with suitcases with ?sand
• Later on he sees the other big dick guy in a car while he’s driving
• He attempts to get his attention but the other guy, after recognising him, crashes
• Turns out the guys wife is giving the big dick guy a blow job while driving
• At the funeral, the big dick guy’s girlfriend relays the ongoing affair with the man’s wife since the swap
• Also she states that the big dick guy wanted his wife to leave him - but she loved him and wouldn’t leave despite her addiction to the big dick

This was The Ambidextrous Lefthander