The commanding officer will be able to begin the investigation and also prosecute the abuse.
The most important issue right now would be your safety.
If the soldier's relationship doesn't affect the routine and doesn't bring negative attention to the military, usually, no action will be taken. (3) Involve, or appear to involve, the improper use of rank or position for personal gain.
(5) Create an actual or clearly predictable adverse impact on discipline, authority, morale, or the ability of the command to accomplish its mission.” Your relationship isn't breaking regulation IF you are not in violation of any of the above mentioned factors.
Generally, the UCMJ will not charge a soldier with adultery if the person who is married, happens to be separated. Relationships between Soldiers of different rank are prohibited if they— (1) Compromise, or appear to compromise, the integrity of supervisory authority or the chain of command.