This seems to be about someone cheating on their spouse, the words at least seem to fit that, especially the ‘holy unity’. I like your style of poetry, very nice.

doubt: ultimate chemistry killer.
I didn’t interpret this as cheating, but as a first kiss, maybe a test kiss, to judge if the other person was right or not..
I also thought it was a metaphor for a bad experience in bed..
SO
that means its a very good and vivid poem, with room for interpretation.