Found this video of a sexy black woman masturbating in her (I´m guessing) third trimester, can you guys help to identify what´s going on with her pussy in this video, are we seing a low cervix or?

Is this common in pregnancy? Is this dangerous?

Apparantly the woman in this video is enjoying herself and does not seem to bothered, so  all the power to her.

https://www.redtube.com/14982971