be careful for what you ask for
Number 1 is right. I was the third person in a marrital threesome. He asked for me join in with them as I have a larger cock. For a while it was fine and then Mrs ******* wanted me on our own. It was only me not wanting her by myself that changed things. She's now met another guy, probably more well endowed than her ex. He's now living on his own.
friend and his wife begged me to breed her. wanted the big cock satisfaction. I finally gave in. he came home 2 hrs later and I was close to finishing the 2nd time. She had cum several times and was finishing the last one, she was crying hard. He ask me to stop. I did and it pissed her off. She wanted me to finish. We did this again few days later. I left her sore and satisfied. So satisfied she wanted it every night. She no longer wanted him. She finally ask him to leave and me to move in. I did not and lost her and him as friends.
Fuck your own wife and don't let some other guy in her. Have been part of this few times, none have ended well.