First lady Michelle Obama was heckled by an activist associated with GetEqual during a DNC event on Tuesday.

Obama was speaking at the private home of Washington, D.C. lesbian couple Karen Dixon and Nan Schaffer.

Gay weekly the Washington Blade identified the activist as Ellen Sturtz, 56.

Obama appeared upset by the interruption and reportedly approached Sturtz.

“One of the things I don't do well is this,” she told Sturtz. “Listen to me or you can take the mic, but I'm leaving. You all decide. You have one choice.”

The crowd begged Obama to stay and Sturtz was escorted out.

Sturtz said she relocated to Washington from California to help secure passage of the Employment Non-Discrimination Act (ENDA), which would outlaw workplace discrimination on the basis of sexual orientation and gender identity. Because ENDA appears stalled in the House, LGBT rights groups have asked the president to sign an executive order which would apply to contractors doing business with the federal government. The president has said he prefers a legislative solution.

“I have been the nice lesbian; I'm not nice anymore,” she said. “I'm nice, but I don't want to be quiet any longer. I don't want to listen to the non-profit organizations telling me what the timeframe is – how many decades I'm going to have to wait for full federal equality.”

Sturtz said she paid the $500 entrance fee to attend the event and has previously donated to the Democratic Party.