Red Emma: The emotional aspect of a relationship of Cups territory, & to generally refer to those associations/attachments of the heart. Those instances where the heart & altruistic rule, not the intellect nor other influence.
Pentacles of the manifest, material effects. The apparent conditions of a relationship as related to its 'health'--solidity, security, & longevity. Since none of those apparently an issue, no Pentacles appear.
Based on Swords associated with Air or the mental realm, Swords expressive of perceptions, thoughts, understandings applied to or arising from a relationship. Also the conflictual to the arguments.
Within the context of what seems to be a daily card (& not a reading on what transpired), 10-Swords to relate to & describe the experiences of that day; according to that observed & perceived.
Moreover, 10-Swords to also describe the development of a situation within
the relationship. Thus, tends *to include & refer to those underlying conditions or influences over time--due its aspect as 10-Wheel of Fortune--that contributed to reaching that intensity or culmination of 10. & if a daily card, then of the precognitive or even a warning.
As further explanation, the progression from Ace-Swords, which presages or marks the beginning (of the conflictual) to the culmination of 10-Swords:
From Ace, it progresses to 2-Swords, where one observes & notes the experiences as for future reference. Such experiences may be relatively new in the relationship, so though of some discomfort, a willingness to reserve teh judgement (as for some later time).
From 2-Swords to 3-Swords, where the equilibrium upset by a larger
disappointment &/or a sense of betrayal. A realization of the offensive &/or the painful of the in-thy-face variety.
From 3-Swords to 4-Swords, the attempt to understand, pick up the pieces, make peace &/or retreat to recover.
From 4-Swords to 5-Swords, where one aroused (again) to the conflictual. The further incursions on thy person like 'border skirmishes'; of more frequent occasions & leaveth one wary.
From 5-Swords to 6-Swords, the need to distance the self &/or to agree to disagree. & perhaps to still move forward.
From 6-Swords to 7-Swords, which entails the skillful manuevering around the not quite avoidable/escapable hostility. Striving against the odds.
From 7-Swords to 8-Swords, where one requires all the knowledge available to find a way out of apparent impasse & still retain one's sense of self & perspective.
From 8-Swords to 9-Swords, the mental anguish & self-defensive. Continued attempts for self knowledge &/or resolution.
From 9-Swords to 10-Swords, the proverbial 'straw that breaks the camel's back'. The zenith of arguments. Expressive of the utter thoughtlessness visited upon one. One would think after all this time, the more things change or despite the life changes, things would not remain so much the same. As is written, 'all things pass'. & tomorrow another day.
The emotions indeed related to Cups; however, at any one time, more than just the emotions contribute to the status of a relationship.
Composed, too, of the inspirational, the motivating--that of Wands. Wands expressive of the principle or value of a concept/thing. Such as belief based on a value system. Anger or righteous indignation more of Wands territory. Swords also reflective of principle; however, more of the abstract concept & the intellectual reaction; that related to communications. Encompasses conflicts; frustrations; stresses on the mental level. Which in turn, impact the personal position & the sense of self in relation to the other party. So whilst Cups could appear (& as the experience 'settles'), the larger influence that of communication on the basis of principle & understanding of principle. With 'communication' in this instance the argument.