I fixed it ! thanks a lot ^^

Never heard of MC ever doing that before, but if you think that's the cause (doubtful) then you're best off getting support for it over on NRaas as it's their mod and their support you need. Good luck.

Literally nothing else could be doing it ;-; it gets fixed when i remove MC ;-;

1 - Is your game patched up to 1.67? Even if the Launcher says it is, use the SuperPatcher and force it to run anyway if you haven't already done this, assuming you want to be on the highest patch level. The Launcher often does an incomplete job of patching but still reports that it was successful.
http://help.ea.com/en/article/the-sims-3-super-patcher

2 - Are/were you using the latest version of MC and its add-on modules? A mismatch can cause erratic game behavior or crashes.

3 - MC does not cause problems like this, but it can be a victim of a misbehaving or out of date third party tuning mod. What happens if, as a test, you keep your NRaas mods in and remove all of your other mods instead (and clear your cache files after each change to your Mods/Packages folder)?

If none of the above help, even with all other mods removed, this is as far as we can take this here. Please open up a support thread at NRaas so we can help you get this fixed.
http://nraas.wikispaces.com/page/messages/Chatterbox (free registration required to post)