Like a deer in the headlights

"Lisa! What?"

"I told you I was okay with you and Heather."

"You also said you were okay with me and Taylor, I thought you were kidding!"

At that proclamation Heather's eyes look up from her task in a silent "Wait, what?"

Stroking Heather's hair, Lisa makes a go ahead expression as she turns her head back to Zack.

"Consider this an apology for the other day. An apology that includes orgasms, which, if you ask me, is one of the best ways to apologize," Lisa smiles.

As this conversation happens Heather continues her expert efforts much to Zack's appreciation, it taking monumental effort on his part to actually have an intelligible conversation as Heather's nimble tongue teases him, her mouth taking him in like her life depended on it.

Touching Zack's face, Lisa leans in. "Don't overthink this, Zack. You want her, she wants you. Just take this one moment at a time."

Kissing him, she pushes him down on the bed.

Lisa pressing against his body, he feels his cock pop out of Heather's mouth.

He moans in frustration into Lisa's mouth until he feels Heather straddling him.

Heather's hand takes hold of him, and guides him against her slit, but to his surprise she doesn't have him enter her, but rather set his length against her lips as she starts moving her hips, her pussy rubbing against him with every movement.

As Heather teases him Zack's arms take hold of Lisa as they share a deep kiss, her beautiful naked skin sliding against him.

With a little hop Heather self impales on Zack's aching cock, her eager wetness allowing her to lower herself until he was hilt deep into her.