I have this problem when I stay with one of my sisters. She gets up herself so that's not an issue, but there is a very loud creaky floorboard outside of the bathroom which also runs into the bedroom I sleep in, and it is impossible for me to avoid stepping on it. Inevitably, every time I get up, as soon as I get back to bed, I hear my sister get up, woken by the sound of the floorboard!
But the most embarrassing thing was last time I was there, after I had had a ‘dump’ my sister remarked in a light conversational tone, that it was a pity that she could hear me when I go to the loo, but she supposed it didn’t matter as it was only the two of us! I was mortified. I try to put off using the bathroom until she is in the kitchen, the farthest room from the bathroom, or watching tv which is on loud as she is a bit deaf, but at the end of the day you have to go. I put paper in first to deaden the noise, but I have piles which can make it difficult and if I pass wind it is just a scientific fact that if air passes through a small gap it makes a noise. It is bad enough at home, as I live in a terraced property with adjoining bathrooms - I run a tap if I hear someone in the bathroom next door - but my sister lives in a detached bungalow. She married a divorced man much older than herself, (long since dead) didn’t like sex and had no children. We don’t normally talk about bodily functions - I have friends I feel more comfortable with, but she values ‘family’ and I doubt if either of us has more than a few years left so I don’t want to stop visiting while I still can ( usually only twice a year and she never comes to me as she cannot travel). But I can’t get over that remark!