Wife Is Weird Sexually

My wife and I have been married a long time, when we first together in our 20s she was very sexual, which I really liked. She wanted to have sex every day and like do you have threesomes with the other guy. She like to be fucked in her mouth and her pussy at the same time. She also liked to have two dicks in their pussy at the same time, especially if we both came inside of her. As we have gotten older, her interest in sex has decreased. She finally reached a foreign where she’s just not interested in sex. She wants to have sex about once every two months. I have noticed something unusual as well, even though she’s not interested in having sex. If she has a few drinks, she will give oral sex to other men. That’s typically the only way I can get her to do anything at all. I have several guys that like to hang out at my house I’ll drink on the weekend if she’s there and we are all drinking she will start flirting with all of my friends, and ends up sucking everybody’s dick including mine, I like the way I go last because it’s a turn on for me watch her suck their dicks. She normally doesn’t want to be fucked She just gives everybody a blow job. What’s weird is I know that she is turned on but she never messes with her pussy. We have a good relationship. It’s just frustrating. She doesn’t want to be fucked. It wouldn’t bother me at all. She would let another guy fuck her, I just want her to get some dick. She admitted to me a while back that there are several guys that stop by on a regular basis ito get their dicks sucked.