Your intimate images are your private images and your ex-girlfriend has no right to share them with anyone else or on the internet. Even if you both have clicked or shared it with consent with each other, it doesn’t mean that she can share it.

If the posts can harm your reputation in a tangible way. Using someone’s picture without their permission is an offense under cyber law. Under cyber law, you can file a complaint in a cyber cell police station against your ex-girlfriend, who is doing this crime.
You can talk to her about this matter and should try to change her mind.

Posting someone’s photos is violating the right to privacy. The right to privacy is also recognized as a basic human right under Article 12 of the Universal Declaration of Human Rights Act, 1948, which state as follows: “No one shall be subjected to arbitrary interference with his privacy, family, home or correspondence, nor to attack upon his honor and reputation. In your case, it will be the case of infringement of the right to privacy.

Secondly, this will be a case of defamation too. As she is trying to defame your reputation. Section 499 and Section 500 of IPC deal with defamation as an offense. It is considered as a statement of fact, which is unprivileged and not true, that must harm someone’s reputation, either by spoken or written, and the same must be published before the third party. You can take legal help to solve the matter if she tries to post your private photos.