IndigoWaves
The 4P as "the kind of relationship that someone wants" with a particular person comes across to me as no relationship, at least not a close or intimate (i.e. sexual) one. The 4P person could be having fantasies about/desires for someone if other cards suggest it, and may be acting on this while alone, if you catch my drift, but he/she isn't actually reaching out for more of a connection or otherwise letting that person gain access.
Any feeling here is very much self-contained and the focus is on maintaining the status quo: there's no letting go of what is already possessed in favour of anything new. I would not see the commencement of an affair in this card at all, and probably not one already in progress, either, considering the anti-4P risk-taking that this would naturally entail... So, if someone's hoping to have an affair with the 4P person, I'd say "don't count your chickens" (unlikely to hatch), and if someone's worried that an affair is going on or imminent, I'd advise him/her to relax.
Any feeling here is very much self-contained and the focus is on maintaining the status quo: there's no letting go of what is already possessed in favour of anything new. I would not see the commencement of an affair in this card at all, and probably not one already in progress, either, considering the anti-4P risk-taking that this would naturally entail... So, if someone's hoping to have an affair with the 4P person, I'd say "don't count your chickens" (unlikely to hatch), and if someone's worried that an affair is going on or imminent, I'd advise him/her to relax.