Anyway, it is not the same a girl who has boyfriends or partners more or less stable, but that can change over time, to girls who are married and even with children (as is the case of MissLexa).
In my opinion these cases are more "exotic", because it is undoubtedly that formal marriage implies certain ties and mutual agreements that other models of cohabitation do not imply.
To me it seems very normal that a porn model with a partner (boyfriend, or whatever we want to call him) can go with other guys and shoot videos. They can have an open relationship.
There can also be an open relationship in marriage but, at least in MissLexa's case, she's not doing it with others because they want an open relationship but to expand her business.
MissLexa needed to do threesomes to attract and retain more audience, and she needed to fuck other guys so that her repertoire wouldn't become too monotonous (it already is quite monotonous because of not showing her face).
And that space has been filled mainly by "Tony", which is what she had on hand at the time. A friend of her husband who seems trustworthy and who has no qualms about showing his face (something very important to make good shots).
More obscure is fucking with fans chosen randomly through a raffle... I think she's not choosing them randomly, because it would mean having to fuck a complete stranger she knows nothing about and who probably wouldn't measure up on camera to make a good porn video to sell. I think she does some kind of casting prior to the video.
But come on, the fact that she fucks with (in principle) unknown guys simply because they have paid and won a raffle is mind-boggling. And it is also forbidden in OF.