to separate entities would imply incest, say you met another you like a clone or an alternate universe you that's exactly the same except they got a turkey sandwich instead of the ham that one time at subway. That would be asexual yes buuuuuut pretty sure its still incest.
the alien would totally rip it off if that happened, and usually the facehugers know the difference. like sometimes the alien would have a facehuger attach to hand or body and it would deliver it to the host that isn't alien-xeno. but still love this, the alien look amazing.
This makes me question the intelligence of that facehugger, it can't even tell the difference between prey and its own kind. It is a very good piece, great details, the xenomorph looks confused (I would be too), well done.
I saw this very same concept on a strange comic-book, "Alien Havoc". It was the work of some of the most prestigious comic-book artists of the 80's and 90's (Moebius, David Lloyd, Sergio Aragonés, Arthur Adams, etc.). Interesting stuff. Anyway, you've made a real Giger like painting: creepy, surreal and... incestuous.