Thank you everyone

I have a very loving relationship with my housemates parents and they know I have been diagnosed with something called DID because their son (my housemate) was still living there when I was going through the diagnosis. They don't understand DID at all and we don't talk about it. They know I have been through child abuse and they know I am as of 7 months estranged from my parents. They know I get very depressed and don't see them very much when I am very low. But I don't feel able to tell them all the intricate details of my life. They are of my parents age and it just brings back way too many bad memories of trying to explain my mental health to my own parents. Does your SO have someone he can talk to about it or is he looking for support from his parents? Is that why he wants to tell them? I wouldn't say don't do it and I wouldn't say do because a.) it's not my place and b.) it is so dependent on the parents themselves and I don't know them from adam! So the point of this post -- not really sure lol. Just, yeah. Good luck with this decision!
Thank you for sharing this, it helps.
I think the issue at hand is that they do work in the health care field (both her parents and sibling) and they do know some things about it. Her sister doesn't know about our DID but we have discussed DID before because I am the partial/closest caretaker of another DID system who lives in a ward. This has come up sometimes because they would call a lot and there was a lot to do. She thought DID was the most perfectly natural response to trauma. No problem there. I would be much less insecure about giving this information to her - the only problem being that she would tell her parents everything, and in turn making this point mute. So back to the parents - they know bits about what it is (at least her mother) but not much - but I don't think they would just go with what we'd say. I think they would look it up, and only being native speakers - I know what comes up if I search for DID (or this country's equivalent) - and it's not very nice. Here it is mostly unheard of (I never heard the term or heard of any meaning, Sybil or otherwise, until very close to getting my own diagnosis) and I don't want the information she would get to be 1980's MPD stuff.
She doesn't have someone to talk to about us being DID other than health care professionals (she has her own) but this doesn't seem to be the issue really. The reason she wants to tell them is just to include them more in our lives. We visit them often, talk to them often and while they are very distant in behaviour, they are also very close in, well, their proximity to each other. They like to be around each other and share aspects of their lives, even if not on an emotional level. This is perfectly reasonable of course, but gets complicated by the fact that this is, in the end, a disorder I have - and not one I like to share with other people for no reason.
Im a private person, so I personally do not want anyone to know.
I feel much of the same.
I can hide it prety well so it's not something that requires an explanation if I've switched and I have.
Again, I feel much of the same. They have met 5 or so of us I think and we do regularly switch while we are with them. They've made a comment to our SO that "it's hard getting a grip of who I am sometimes" but they've never mentioned anything pathological or anything like that. There's been no reason to explain difference in behavior or anything before, nor is there really now (at least for such reasons).
Would they still accept you? would they be supportive of the relationsip or do you think they might interfere and cause issues that could separate your support system?
These are my worries really. I think it depends on how they view DID. As stated before, they're very forgiving of problems or differences that aren't of your own doing (e.g not your own fault). Literature about this in this country is faulty at best and might well have them end up with thinking this is me just "trying to be special" and therefore not accepting me nor the relationship. On the other hand, it might make sense to her and give me further acceptance. Hard to know in advance, and even harder to trust when you're not the one wanting to tell.
We've talked with our SO about this many times and she respects our decision, when it comes down to it. She wants to include them more, but does realize that this is our choice to make in the end. This is our disorder and our healing and our life. She has also responded to the fact that we want them to get to know us as a person before getting to know us as alters - because jumping right into alter territory might scare them and make them unable to relate to any of us. We're hoping to build a solid relationship with them first and then tell later on if necessary. We are still considering things though as this does come up from time to time.
Thank you all for responding.