Oh oh oh beautiful ladies, and fuck fuck FWs!!!!
They are crazy crazy crazy - everything you both say Maggie and Fly (((You both being soooo amazing and big hugs!)) - mind you, after my craziness this week who am I to talk!
Yes, I would say, he's invaded your intimate privacy maggie(which is sexual, he is trying to sexually humiliate I would think), but I seriously wouldn't worry about the DC seeing it, you have enough to worry about, just tell them every woman in the world has them or similar, its no biggey, and well done for leaving it there. Or you could feign distress, as it being he 'worst' thing he could ever do to you, and maybe he'll just focus on throwing sanitary towels around the place, rather than throttling or groping you!! I guess, some hope? that would be too easy! I am sorry you're ill. don't worry about what it symbolises (the ST that is). Sleep with your poorly dc in the bed all day and get well soon, or in their beds, but that sofa lark is just awful, are you keeping warm enough. Hot water bottles and stuff so that you are hot to sweat it all out (gross I know, but it works, hot baths).
Try glad he's making himself look so ridiculous to you as to put an end to any feelings still straggling around.
FWIW I would take the DC and go, because of the harm it is causing you all to stay, and tell him that. Say that contact will be resumed once some normality has [... you all being back in the house when h'es gone] in the meantime the dc are suffering and need space and time to recover from the awful environment that they continually surrounded by. I think you are doing a brilliant job coping with them in the face of all this, and standing by and showing them the love and kindnesses and support that they need, but there is, I think, only so much they can take, and you! You are doing everything you can to get this all sorted, as well as being very strong against him. It won't be so long till he's out so tell him normal contact will be resumed then? I know the kids won't want to leave their house, but you can reframe it as a nice long holiday, and when the holiday is over you will just come home and have the whole house to play in. Then say he's away working - could that work, that he could be working away, or on his ownn holiday, just so they don't sense any kind of 'leaving' from him or them? All you are doing is removing them from a dangerous unstable environment and you have good cause because he has threatened to kill himself in front of them; terifying 
Is there anything workable in there for you? DC hve no sense of time atall (age dependent), and if there needs to be a visit because they are desperate to see him, then do a supervised (with family member), in the park or public place, taking them to dinner or summat? Or a weekend in the middle to break up the long time? The sooner that you are back in the house the sooner normal contact can be resumed.
I am just throwing suggestions into the air, ways of looking at things from some different angles to see if anything might occur to get you out of this mire right now. Possibly none, or a bit of some, or your own different plan. It just sounds awful, I feel so sad that you have done all of this and now find yourself stuck in this way! grrrrr, for you.
How long is it now before you take full possession? xxxx
take care ladies XXX
I managed nearly all 8 hours sleep last night, so feeling quite invigorated, especially as I switched energy supplier! and energy saving tip - turn off EVERYTHING at night (all that power sucking standyby stuff - should save £100 pa apparently - just sharing for any thatothers in financial crisies!)
Get well soon Maggie
Keep breathing and flying! Fly
lots of love all xxx