Is it normal to hear sex but not say something to eneyone

Gross I'm sorry you have to hear ask her to keep it down

Yes, this is normal. Sex is a very private matter, and this can be embarrassing to both you and your mother. Moreover, if she knows that you can hear her, it can make her uncomfortable and self-conscious. So, it is best if you don't tell your mother. It's probably ok to talk to your sister about it, if she's close enough to you.

Dude get in on that!

You should see if she will let you fuck her.

So your mother did not have sex with your father in the home?

Sounds as if Mom is having sex like she is the only one in the hone. Mom should be more respectful. I would initiate a calm discussion with mother about the noise and how it makes you feel.

Who knows the outcome, but at least she may begin to see you as a mature male who understands sexual urges; sexual needs.

Never acknowledge it. Unless you have the next room and being kept awake, then bang on the wall or shout something. Otherwise never.

Experienced it before I just put on some music lol

That would be a little awkward, now wouldn't it?

If you're uncomfortable I'd make it known in some way that you can hear her. If you're too embarassed to talk to her play music or get up and bang stuff around in the bathroom. Maybe she will get the hint.