How can I tell my sister not to sleep in my master bedroom?

If you don't want your aunt to sleep in your master bedroom, you can arrange one for her.

You can rest in the room and the bed, and then say to her:

You see I arranged it for you.

The resting room is not bad, so that she will no more.

Go sleep in your master bedroom.

Usually the general guests will not choose to sleep in the master bedroom, but it is no exception, at this time you can indirectly explain in advance that you sleep more than the bed, and do not like to sleep with others, from the side hints to the other party. Secondly, arrange the second bedroom as soon as possible, and then explain to the other party in a tactful tone that you can only be wronged, and at this time, most people will choose to accept it gladly.

It's best not to tell your sister yourself, you tell your husband what you think, and let your husband tell your sister (provided that your husband can stand on your side and speak to you), so as not to hurt the peace, if you say it yourself, it may cause your sister's misunderstanding and affect the relationship between your sisters!

Tell her that she has a serious obsessive-compulsive disorder of cleanliness, and she doesn't like anyone to touch her things, things that have been touched, and she has been uncomfortable in her heart and can't accept it.