there's no link, so it would classify as internet unsubstantiated
but.....a good friend that I have known for 10+ years has Broncos season tickets. To be more specific, his family has season tickets, and have had them since the mid 60's...before he was even born.
anyway, he and some others flew up to the Ravens game a few weeks ago, and they were rubbing elbows with some old family friends, etc, etc
Apparently, since moving to Denver, Mrs. Manning has brought her "boyfriend" around to social events, charity functions, and the like. There is no attempt to hide or conceal the fact that she's banging some other guy. At some point in this past season, she even sent a private jet to go pick him up. It's an agreement that her and Peyton have. As it was told to me, he gets up around 4am, goes to the practice facility, comes home sometime late in the evening, and goes into his study and sits and studies more game film until late in the night....every single day.
as to his sexual orientation, I got the feeling that was pure speculation on their part, and not really substantiated by anything of substance
take it for what it's worth, which is probably around $1.85. While I 110% believe that my friend told me exactly what what told to him, there really is no way for me to verify that it's true. Only a bunch of long time Broncos fans who spend a good bit of time in the Denver high-social scene say it's happening.