I'm 7 months pregnant and my husband's snoring has been getting on my nerves. I also get restless and am a light sleeper because of heartburn. So, halfway through the night, I sometimes ask him to sleep on the settee .
That way, we both get some sleep.
My sister has been staying with us for a while because her flat was recently flooded, and I have just found out that she has taken pity on him and has let him into her bed on at least two occasions over the last month!
The only reason I found out, was I went down for a glass of milk a few nights ago and he was no longer on the settee.
I heard laughing and found them in bed together.
They weren't doing anything and weren't even led close to each other.
There was no jumping apart when they saw me. Or guilt that I could see.
The spare bed is a Kingsize, so there was plenty of space between them.
It seemed to be on the level, and I was so tired, I went straight back to bed and decided to ask questions in the morning.
The next morning, in the kitchen, I questioned them and according to her and him, all they've done is chat and then fall asleep and I should be okay about it, because she's my sister and I can trust her and she would never do anything to hurt me. And she said she felt sorry that she was a guest and had a bed and yet he had to sleep on the settee.
And in her words: 'She sees him as a brother anyway'. He said he looks upon her as an extra sister.
My friends (and my mother) think I'm crazy to allow this. But, she's my sister and I can trust her. Can't I? 
The only thing that makes me slightly uneasy is that she dresses skimpily in front of him and is very flirty. But that is and always has been her nature. She is like it with everybody.
Still, it makes me feel a bit shit, because I feel unattractive and frumpy at the moment as it is. This is making me feel worse.
And if I'm honest, I feel a bit hurt by their attitude. The way he seems to flirts with her and the way she encourages it.
Or am I imagining it?
Is it normal for a sister to treat another sister in this way? is she just being kind in sharing her bed?
Is this being too close?
Am I being paranoid? Or is it all the fault of my hormones.
Should I be okay with it?