Katherine Schwarzenegger and her brother Patrick Schwarzenegger arrive for their mother's California first lady Maria Shriver's annual Women's Conference on October 26, 2010 at the Long Beach Convention Center in Long Beach, California. (credit: Kevork Djansezian/Getty Images)

LOS ANGELES (CBS/AP) —Patrick and Katherine Schwarzenegger, two of Arnold and Maria Shriver’s children, spoke out Tuesday about their father’s infidelity.

Patrick Schwarzenegger, 17, tweeted first Tuesday saying,”some days you feel like s—, some days you want to quit and just be normal for a bit, yet i love my family till death do us apart.”

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The teen signed his tweet, “Patrick Shriver.”

(credit: Jason Merritt/Getty Images)

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Patrick’s message was followed by his sister Katherine’s, 21, tweet,” This is definitely not easy but I appreciate your love and support as I begin to heal and move forward in life,” she said. “I will always love my family!”

Schwarzenegger and Shriver announced May 9 that they were separating after 25 years of marriage. The former governor acknowledged Monday that he fathered a child with a member of the couple’s household staff ten years ago. The child was born before Schwarzenegger began his seven-year stint as governor of California.

In addition to Patrick and Katherine, the couple have two other children: Christina, 19, and Christopher, 13.

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