Pulling a Peter Doppler

When someone's husband or boyfriend has sexual intercourse with a transsexual prostitute.

Example 1
Woman 1: My husband cheated on me with the transsexual hooker at the local gas station...
Woman 2: Oh, I'm sorry to hear that. It looks like he pulled a Peter Doppler on you.

Example 2
Transsexual prostitute: I'm sorry that your father keeps pulling a Peter Doppler on your mo-
Teenage girl: Please, Benni. Shut the fuck up. Just give me the money.