I gotta say that it may be just Adult Fiction what you're writing. I don't know what you mean by writing YA for "twenty something" yeah old, because that won't be an YA.
So just so we clear on your question, "Young adult fiction (YA) is a category of fiction written for readers from 12 to 18 years of age." - according to Wikipedia.
If you write something higher than PG-13, it is not to be considered YA for safety reasons. It is, in fact a NA, which is from 18 to 30 years old. Because that kind of content is available to read starting from that age only (actually it is from 17, but nvm).
People have various opinions about rating and age ranges, which is due to their ignorance in the subject (they are readers though and not to be blamed for this). Sexuality (like nudity and futher), intense violence, hard language with sexual meaning and heavy abuse, and drugs are to be rated high (R) and be a part of NA, not YA.
So just so we clear on your question, "Young adult fiction (YA) is a category of fiction written for readers from 12 to 18 years of age." - according to Wikipedia.
If you write something higher than PG-13, it is not to be considered YA for safety reasons. It is, in fact a NA, which is from 18 to 30 years old. Because that kind of content is available to read starting from that age only (actually it is from 17, but nvm).
People have various opinions about rating and age ranges, which is due to their ignorance in the subject (they are readers though and not to be blamed for this). Sexuality (like nudity and futher), intense violence, hard language with sexual meaning and heavy abuse, and drugs are to be rated high (R) and be a part of NA, not YA.