This work could have adult content. If you proceed you have agreed that you are willing to see such content.
Post S5 (speculative); canon to the end of S4. Gwen and Arthur have been married for several years, Merlin's magic has been revealed and Arthur has now reached a kind of cold peace with it. Then a delegation arrives from a kingdom based on magic, and suddenly Destiny is starkly and ruthlessly to the fore. The question is should - can - it be avoided?
Warnings: One scene may be interpreted as dub-con, infidelity, attempted suicide (magical/fantasy), season 5 spoilers. Angst. Please do not read if ambiguous consent or any kind of force used in sexual situations is a trigger or is distressing to you.