If the text indicates a character’s feelings or internal thoughts, that is the POV character. Avoid changing POV too frequently. It is a common practice to include a blank line when POV switches, to help the reader.
Example of really baaaad head hopping:
“We could play poker.” Darla smiled at Rick, hoping he’d say yes. She wasn’t ready to say goodnight just yet. [Darla’s POV]
Rick dragged a hand over his jaw and nodded slowly. The devil in him wanted to suggest a small adaptation of the game. One involving the removal of clothes. [Rick’s POV]
Darla didn’t miss the wicked sparkle in Rick’s gaze. Her skin prickled with anticipation. “I’ll get the cards.” [Darla’s POV]
“Super.” Rick watched the sway of Darla’s hips as she sauntered to the kitchen. [Rick’s POV]