No. Adultery requires a sex act with someone not your spouse, or with the spouse of another. A kiss does not qualify.

Whats considered adultery in the military?

There are three distinct elements to the crime of adultery under the UCMJ: first, a Soldier must have had sexual intercourse with someone; second, the Soldier or their sexual partner was married to someone else at the time; and third, that under the circumstances, the conduct of the Soldier was to the prejudice of good