[Note: I’ve written out the full story now. I’m including the first part for reference]
This just happened last night, and I’m still horny and shaking, tbh. I jotted down my memories late last night when they were in bed together, so I could remember as much as I could.
Our marriage dynamic has changed a lot this past year. My wife, Sara, and I are in our mid-thirties, and have been together for several years. For complicated reasons, my Sara’s libido has skyrocketed this year, while mine has not, causing significant tension due to the difference in sex drives. We ended up opening up our relationship, and Sara has a much younger fwb, Mark, who’s as sexually insatiable as she is. Mark and Sara don’t really have anything in common other than sex (he’s a stereotypical former frat jock, and she’s a highly educated professional) but they are extremely sexually compatible. Our own relationship had improved a lot because I feel less pressure to constantly have sex with her (I enjoy sex, but just not as often as she needs it).