Draco did not like losing control of the situation, and Parvati buying lingerie was making him lose control of the situation.
"Anyways," he said firmly, "we should start decanting the wine for dinner and such," he began to usher Parvati and his brother into the house. "Iggy, are you staying? The house elves are making flaky chicken pot pie."
Looking at his wife, he then directed his attention to his brother. What did Iggy think when he looked at Parvati? He felt a bit ill at the idea of Iggy now having the right to be part of the Patil network. What if Mr. Patil found Iggy more delightful than him? What if Mrs. Patil invited Iggy over for an event and didn't invite Draco?
Sighing, Draco went to take another sip of beer only to find the bottle empty.
"And I need another beer. Do you want?" he asked his brother. "Parvati, did you want some pink wine before dinner?"