A 9w8 also makes more sense for initially identifying with SEI.

However, most ESI who feel 8, in reality, are sexual 6's.
https://www.typologycentral.com/wiki/index.php/Enneagram_6_The_Loyalist

Sexual/Self-pres

The sexual/self-pres Six is more concerned with strength, beauty and merging. With this stacking, the counterphobic energy is directed more toward individuals than towards ideas and concepts. It’s more about controlling the people closest to them. Paranoia arises when the Six feels abandoned by intimates. In the sexual/self-pres Six, doubt and anxiety is relieved by the knowledge that one’s intimates really are trustworthy. These Sixes are always testing their mates for loyalty. The sexual Six is counterphobic in terms of needing to prove their desirability and strength.
This type is identified with their respective gender roles for security. They can be competitive and appear Eight-like. Male Sixes are likely to show strength as a form of counterphobia. Female Sixes are likely to emphasize their looks in order to be attractive. Security comes from knowing they are desirable. They can be very possessive of their mates. This can turn to extreme jealousy. On the down side, paranoia about the relationship can set in. The sexual/self-pres Six can appear Three-like, because of their need for validation and competitiveness.
On the high side, this subtype can be the most fiercely loyal to their friendships and to those loved ones who have gained their trust. The intensity of the sexual instinct brings with it a passion that is unwavering for the love and protection of their loved ones. The nature of the Six to “go towards,” combined with the merging of the sexual instinct, can sometimes create an idealization of others, the ones that have passed the test of the Six. On the down side, the fear of losing the close relationship can cause this subtype to desperately lash out counterphobicaly.
Sexual/Social

The counterphobic stance of the sexual Six can be seen in competition for attracting the right mate, and in testing to see who is worthy of trust. This is true of both sexual subtypes and especially true of the sexual/social. This type is likely to be found quite commonly among actresses and actors as they tend towards a dramatic presentation. Their need to be identified with their desirability and their strong social instinct, combine to sometimes make them public figures. They are less possessive of their mates, but still feel the need to have control in the relationship. They can have a very focused intensity. They can appear Four-like in their desire to express themselves and give into their passions. They define themselves in accordance with the prevailing gender norms opting to appear masculine or feminine as the case may be. This outward energy is sometimes counterbalanced with inward doubting, which can lead to depression, anger, and acting out, at the lower levels of health.
Anxiety isn’t as noticeable with the sexual variant of type Six, especially when the self-pres instinct is last. The typical things we associate with anxiety aren’t obvious with this subtype. Their anxiety is focused in the arena of relationships, and since their stance is mostly counterphobic, anxiety is not always obvious, and the Six too might be unaware of its presence. This can be true of all the subtypes of type Six. Their anxiety exists at a core level so that Sixes don’t always know how to gauge its existence. So, even the more visibly anxious subtypes might not be aware of their underlying anxiety. The sexual/social can appear Eight-like, in their defense of their loved ones and social standing.