Denise Richards is pulling double mommy duty.
The adorable boys, who are in Richards' care while their mom completes rehab for prescription drug addiction, looked happy while enjoying a hayride at Underwood Family Farm just outside of L.A.
The brother-duo looked cute in colorful shorts and tees while Richards looks casual chic in mint pants, white top and sunglasses.
The family was attending a children's birthday party at the farm.
Max and Bob, 4, have been in Richards' care for almost two weeks. Mueller is currently at UCLA Medical Center seeking treatment.