Sims walking like they're cold and slipping on floor

A few thoughts that may or may not be relevant for either of you...

• Do you have Mods/CC?
• VampireCompany​ ...in your image it looks like there is snow on the ground... and is there a reason the sim is in their swimsuit in the winter?
• Please try checking if your floor and ceiling are in place and your rooms are 'complete' in the home:
  To see if each room is complete/a sealed room (has a floor, ceiling, and all was connect to make a complete room), click the wall on the room to see if the entire room highlights just by clicking one wall. Also, if the floor or the ceiling is missing, this could cause the room to no longer be sealed from the cold.

If the ceiling &/or floor are missing, they can be added as follows:

Build Floor:
1. Click a wall on the room. The room should highlight.
2. If the floor is missing there will be a yellow rim around the floor.
3. Click the yellow rim and there will be a popup that says “Build Floor”.
4. Click the phrase “Build Floor” and the floor will be created by the game.

Build Ceiling:
1. Click a wall on the room. The room should highlight.
2. Use the ▲ arrow to go up a floor/level.
3. If the ceiling is missing there will be a yellow rim around the ceiling of the room below.
4. Click the yellow rim and there will be a popup that says “Build Ceiling”.
5. Click the phrase “Build Ceiling” and the ceiling will be created by the game.

Tip: If the room does not highlight when you click the wall, the game may not be seeing it as a room. To fix this please retrace the room with the wall tool. Sometimes this fixes the issue. You can confirm by clicking a wall in the room and seeing if the room now highlights.

Having the same issue.