Additional info ...
https://coloradosun.com/2021/01/14/lauren-boebert-first-week-in-congress/

Boebert’s mother, Shawn Bentz, did not respond to a Facebook message asking for comment about her daughter’s first week in office. Bentz, who is an open supporter of QAnon on social media, went to Washington with Boebert for her swearing in ceremony. She was pictured with Boebert at that ceremony and mentioned that she had gone on detailed tours of the Capitol buildings with her daughter. She was staying with Boebert in her D.C. apartment that first week, according to her social media posts.  

Prior to the Jan. 6 riot, using the Twitter name Shawna Roberts-Bentz, she retweeted White House political advisor Dan Scavino: “See you soon PATRIOTS.” 

Days after the Capitol riots she posted — and later deleted — a link to a violent, dystopian YouTube video portraying the country’s military might under Trump, from rifles to nuclear bombs, and asserting that the military would stand with the president to keep him in office.

“Just when y’all thought My President was hiding out…He will not give up on us! In The End We Win!!” Bentz wrote after first commenting about the post: “If That Ain’t America I Will Kiss Your Ass!!!”

Bentz wiped all QAnon-related and extremist-supporting posts from her public Facebook page, leaving only family photos, medical fundraisers and links to her daughter’s official posts.

When Boebert was confronted during her campaign about expressing support for QAnon in a recorded interview, she backed off that statement and said that it was “more my mother’s thing.

And this:
https://www.steamboatpilot.com/opinion/letter-lauren-boebert-must-be-expelled-from-congress/

Interestingly, her mother, Shawn Bentz, was a participant with the mob who marched from the Trump Rally over to the Capitol.

Her mother's facebook page (scrubbed of QAnon?)

https://www.facebook.com/shawna.bentz.9

Circumstantial evidence; without some sort of third party verification it is hard to be sure. However, it does not appear so far fetched.

Update:  The bullhorn lady has been captured, not Bentz.  It pays to be cautious when making accusations .