She has a problem. Compulsive Sexual Behavior..aka nymphomania (derogatory term). Or suffers depression.
What Is Sexual Addiction (Compulsive Sexual Behavior)? What Causes Sexual Addiction? - Medical News Today
Nymphomania is derogatory? Who decided that?
It would only be a psychological condition such as nymphomania, or an addiction, if it was something she couldn't stop or was compelled to do and did do because of some other condition such as depression, self esteem issues, childhood sexual abuse, etc. Also if it were seriously interferring with or messing up her life, as an alcohol or drug addition usually does.
If this is someone who just has a lot of sex and doesn't limit her sexual activities because society says so, doesn't limit them because women are supposed to behave differently than men, then there is no condition here that is a problem; the problem is society's censorship of her.
A man who did what she does would not be censored, btw. A man who has multiple partners, lots of one night stands, casual sex, etc., is generally not censored, but, instead, admired as a playboy and cheered on by other men for his sexual exploits.
There is a definite double standard here. Because this woman is sexually liberated and behaves like a man who is labeled a playboy would behave, she is labeled a slut and/or someone with mental problems.
Also, if she was a prostitue and made money from this, nowadays, many people would consider it a viable career or job and would have no problem with it. On the contrary, if a man charged for it and made money off the woman, he would be criticized for taking advantage of women.
Double standard. Double standard.