hi scott
he moon/sun midpoint is conjunct to juno and mars is opposed to juno which shows a committed relationship/marriage is clearly is the basis of the relationship. as mercury is conjunct to the moon, you both have this end in your hearts.
the Saturn/venus midpoint is conjunct to juno also which shows a devoted love between you.
the Jupiter/juno midpoint is conjunct your named asteroid which is conjunct to the nadir so all the symbols totally agree with your feelings for each other... your right .. a bit unusual for a relatively young couple.
in addition, the moon/Saturn midpoint is conjunct o the sun wit the sun sextile to Jupiter and Sedna. this further cements the undying loyalty and love for each other. Sedna shows that you are both totally honest with each other
psyche is conjunct the vertex which gives a highly spiritual love for each other. with the vertex ,there is probably a almost supernatural feeling that you should be together. eros is trine to psyche which ,again, gives a very deep, romantic and idealistic affection for each other.
9n addition eris I conjunct to south node and the eros/psyche midpoint is als conjunct eris and the south node...this adds a intense physical/sexual attraction and with the idealistic romantic feelings, it is difficult to see problems as your commitment and the spontaneous affection really create a inseparable bond
though your intimacy is so faceted, there are a couple of aspects that might be of concern.
the moon/mercury conjunction is square to the stellium of pluto/ixion/nessus.
this can show that there are unspoken emotional issues that might not have been broached. nessus/pluto/ixion indicates that there are emotional abusive dynamics in childhood.... most likely these are blocked or repressed, but they can result in unexpected emotional distance or unexpected silence at times.so though you have such good mental rapport,these unconscious dynamic might give uncertain moment about what the other is thinking.
your fiancé may have some childhood experience that she has not shared as improbable as this could seems. you might ask her if here is anything in her childhood that she might fear to share with you .
this composite very favorable and it seems all your will come through.... but make sure that she realizes there is nothing that could change your love for her.
the nessus/pluto/ixion is very strong so I looked at her natal with an eye to see if there might be issues in her childhood.
I am somewhat hesitant to proceed, as if there are aspects, these might be repressed and blocked which .
but there are distinct aspects that tend to show she has had some issues.
first the node is conjunct to her mars.... this can be very problematic ,especially for a female child because it shows that she was born with a strong physical/sexual aura. that is her sexual aura did not just flower during puberty , but others might have felt her sexual aura even as a young child. frankly I have seen this aspect in some sexual abuse victims.
in addition nessus is square to venus. this is another indication of emotional or sexual abuse. the midpoint is conjunct to Neptune which would suggest, if this experience is real , has been hidden all her life.
eros is opposed to lilth, which is not by itself a indices of abuse, but with context of the afore mentioned symbols,this aspect could increase the possibilities given.
the Saturn/pluto midpoint square to the vertex which also can be a red flag of a ... unnatural influence of her father.
I feel there is some dysfunctional emotional issues with in her family.
I also notice that the moon is opposed to chiron.....moon can be read as her mother/mother's influence. with chiron opposed this would suggest that her mother was over critical of her and nothing she did was good enough. it may be her father was were refuge from the mothers criticism.
often ,not necessarily here ,but generally, if the father shows partially to the daughter, the mother will become jealous of the daughter and not treat her as a daughter but rather as a rival. again I can't say for sure this dynamic played out in her family , but the totality and interactions of these symbols does give me this feeling.
there are no conscious issue that suggest his will be anything but a loving and devoted marriage, but when pluto is prominent one must considered the intrusion of unconscious dynamics which could affect the relationship.
as you mention she has gone though multiple relationships, I don't mean to recriminate her at all, but in some case, emotional issues within the family can lead to multiple relationships as an escape.
this relationship has more going for I that any relationship can remember in the near past.so my comments about her natal are not meant to make you hesitant all. you two have an amazing composite.
rahu