Ariel Winter's Mom -- I Want to Grill Ariel's Doc and Attorney about Oral Sex Chat

Chrystal Workman says authorities falsely accused her of talking oral sex to her daughter, "Modern Family" star Ariel Winter -- and she wants to get to the bottom of the claims by putting Ariel's psychiatrist and her attorney on the hot seat.

In her latest legal filing, Chrystal says she wants her attorneys to depose the doc and lawyer in order to defend herself against allegations of sexual abuse she believes Ariel made against her.

According to the docs, 2 investigators from the Department of Children and Family Services interviewed Chrystal on June 19, 2013 -- and asked her if she ever had a conversation with Ariel regarding oral sex with her boyfriend.

In the papers, Chrystal also alleges the DCFS investigators asked if she'd ever given Ariel a very graphic demonstration regarding how to use Monistat 7.

We are paraphrasing, and heavily, because Chrystal's own words in the papers are just that graphic.

Chrystal claims DCFS cleared her of all the allegations of emotional, physical, and sexual abuse.

The upshot ... she now thinks she deserves the right to grill Ariel's attorney and psychiatrist as part of her defense.