Untreated CPTSD can lead to developing ASPD but the symptoms are very different for each(and once someone is diagnosed with ASPD) it means they are at an age where they see how their symptoms are problematic enough to interfere with significant areas of life, yet don't seek improvement(to put it nicely).
The ASPD diagnosis comes at the end of a spectrum(starting with ODD, Conduct disorder and ASPD) the others are there to indicate age group/part of the spectrum, where there are treatment options/parenting styles/parental involvement/medication and support that have a 50/50 chance of improvement.
Though once one gets the ASPD lable it means they know their symptoms impact them heavily and they don't mean to improve and are considered an adult.
I have not seen any correlation between ASPD or CPTSD, and hypersexual behavior in males(though in women with ASPD, sexuality can be seen as impulsive/compulsive, hypersexual as a means to manipulate others).
CPTSD can lead to sexually risky behaviors(as a coping mechanism) or due to emotional dysregulation.
Personally I want to commend the work you have done, to get to where you are in healing.
I do have immense compassion, empathy and even second hand understanding of what it is to heal from this, having been support to these vary situations for two women(not saying all situations are the same or that "it is the same") but I had vicarious trauma from being so in that loop for those individuals(and one of a strikingly similar path) enough to know it is shocking, painful, filled with grief, and how ones own trauma will play up, at these instances and that sometimes *having answers*, only seems to hurt one more.
Please continue on your healing journey as healing yourself, is what you may have positive control over-not the part of the journey that is all his(his diagnosis, his journey within it, his choices/words behavior) that is all for him to heal and only he can do so if he chooses to.
I understand needing answers to an extent, about him(to process) but be weary of roominating on that aspect as that won't help you.
Please don't assume that all of *either label*, equate to what your partner has put you through.
I say this as some fall under that "trap", so to speak and that sort of thinking doesn't help with the healing(it makes folks hyperfixiate, roominate, get stuck on smaller details of a big picture) and not percieve it.
I know all too well, it is very hard to heal from things like this.
Roominating,victim mindset, hyperfixiating, idealizing the past, panicking/panick attacks(this can all simply be part of the grief - it doesn't mean "go back to it or try to fix it" and can be indicative of how triggered and unhealed on is, personally(not as a judgement, its just our minds try to help us in unhealthy ways) our minds are made like problem solving machines (not everything is made to be "fixed") so this can make for messy adaptations that speak to ones own trauma.
The most helpful things I have seen is someone choosing to heal their own childhood, to where they recognize the roots of why they chose such a person, what conditioning and experiences before them made them stay, what "made them", the person that in a way, submitted to this(and longer, without realizing it). It's hard to find balance in these things for many so please go easy on you♡
Both women I knew ended up needing therapy and medication to heal and healing looked different then they may have realized in the sense that they weren't the women they were before this after but they became more self aware and grew, all the same♡
It is a hard journey, I wish it wasn't so hard.
You are in my thoughts ♡