Possible fail marriage/cheating/smut/mature

There is a oracle that a lady with pink hair will become the crown princess, and our female lead has pink hair so after she was born she was engaged to the crown prince but just one month before their marriage the oracle suddenly changed and a bxtch that had pink her took her place and was rude to her. and the trashy crown prince just broke up with our FL and everyone turned on her soon after the oracle changed and she was left with nothing. even her belongings, jewelries an

The female mc'husband is having an affair, so the female mc got also an affair with the archduke (mc)

The setting is set up in their second lives, but i think thou that this is their third lives, but dunno. This time the male mc is doing his best to avoid his mistakes like marrying other empress and such. The male and female mc recover their memory about their past lives.

First timeline: he not only married many wives but also slept with them right after his marriage with the woman he is claiming to love. Also he runs back to her crying that he got the other woman pregnant and it was not intent