It's unlikely, even if they heard, that your neighbors would call for help. Weird shit goes on in hotels, and most people just keep their nose out of other people's business. They'd probably just think you're snoring or something, CTB isn't the first thing to come to a regular person's mind.
To be on the safe side, you can do things such as keep the shower running, play some music at a decent volume, etc. to cover up the noises. Plus you can hang up your 'do not disturb' sign, they're usually respected by staff in case they do get called. They'd only force their way in the next day when you miss checkout.
