It would be highly irregular for a warrior to contact the clan mid-mission. As an agent in the field, you would normally be expected to resolve any conflicts yourself to the best of your ability, and face any consequences when you returned. If you choose to resolve the conflict by accepting the Senator, that is your decision and you may face consequences for that later.
Further to your post, it does not matter if the princess knows about the contract or not. The contract exists between the clan and the royal family, so it is your duty to carry out the contract to the best of your ability. When the contract was made, the royal family bought your life. It is only returned to you when the contract is fulfilled. Until then, your life belongs to them.
That's the traditional view - Nightshade may have other views based on personal philosophy and / or his experiences since leaving the clan.
