The Boys S2 Ep 4 - Gender Transformations

Homelander (Antony Starr) flies to a house where Madelyn Stillwell (Elisabeth Shue) is waiting for him. After a while together, Madelyn changes back to Doppleganger (Dan Darin-Zanco) and claims it is difficult to keep her form for long, but goes back to it for Homelander. Homelander comes back to visit "Madelyn", who eventually morphs into a duplicate of Homelander.