Long story. I am heavily pregnant, living with flatmates and DP. A former flatmate (we'll call them A) of my current flatmate (we'll call them B) has invited himself up to stay, and has just announced he will be here for 4-5 days. At the start of the year, flatmate B said if he ever came up we wouldn't have to deal with him. Flatmate A was previously good friends with B and DP, and I got on with him, but his drug use and behaviour put me off completely, along with many others. By the end of last year, DP was only speaking to him for the sake of B, and even B cut him off around Christmastime for a while.
So B says that obviously she has informed A of my pregnancy and that I wouldn't really be joining them. However, she has gone from saying that DP wouldn't have to have anything to do with him if he came up to now saying that she didn't expect B to stay for 4-5 days and doesn't want to share a room with him for that long. She has said she will share for 2 days, and is now suggesting that DP give up his room, as he shares with me. I go to bed very early, whilst DP comes in at around 6-7am. We use our rooms to do our work, and contrary to most peoples beliefs we don't spend our time together 24/7. DP has also invested in quite a lot of equipment this year, and A is notorious for breaking things, or rooting through things, and I have caught him stealing before.
DP has now caved and suggested moving his stuff into my room. My room is large, but currently filled with baby things. Right at the start, the last time A suggested visiting, I told him I wanted nothing to do with it. I wanted no mention of him, no stories, nothing. I have agreed to say hello and act civil, but I am holding a 'no sympathy' stance, wherein if he upsets DP or B I won't have any sympathy. Apparently, that makes me the bad person. But I also know after the visit I will have to endure hours of complaining and DP being angry and sad. I will also be in the flat, alone, whilst he is over, as no doubt DP will be told or feel like he has to go and entertain A, and I don't feel comfortable leaving the flat for long periods of time with A there, especially if I leave, lock my room and DP can't access any of his stuff.
I hate how A treats DP and B, but I also hate how B treats DP and DP is annoyed that he is being given 50% responsibility for A who he never wanted to see in the first place. Excuses are already being made for A's past actions. AIBU to tell DP I don't want his stuff in my room, in order to make him stand up for himself? AIBU with my no involvement/no sympathy stance?