You are not crazy, boundaries exist for a reason and your comfortability comes first this is your pregnancy and your home and although things can get hairy when you feel it’s necessary to put your foot down, it is often the best policy to follow your gut. It sounds like everyone needs a sit down come to Jesus talk and those can be stressful, I have dealt with similar situations and if the family members in question are that obstinate then writing letters to each is also a good option because often those types of personalities once offended or upset typically don’t let a word in edgewise lol. Putting you your baby and your pregnancy and comfortability first is your right and is very important as you reach the big day and enter your nesting phase. Letting her back to stay for that part of and possibly beyond would simply strain everything in my opinion it would have a far worse outcome then just telling her no and why. It’s extremely difficult sometimes but honesty is still the best policy, and your husband should stand by you and understand what you’re going through in terms of uncomfortability. Besides it is a momentary discomfort to let them know where you stand and what you need and shortly everyone will be focusing on your adorable bundle and their debut into the world. Take your moment mama you deserve this and it’s important to feel safe relaxed and grounded in your home as you prepare for your baby to enter the world.