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Um, it was Lois who elaborated to Bernie and Ashley

Michael
Yes, that was certainly true. So obviously, Lois doesn't mind that much that they know about the details of her and Clark's RELATIONSHIP.

But what I am talking about is that she is bothered by what Clark is saying about their sexual relationship.

The following passage was written from Lois's POV.
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"You'll understand after you've been around Martha and Jonathan for a while," I told him. "They *de-fine* PDA."

"I grew up with it," Clark said. "It was embarrassing as a teen."

Martha rolled her eyes. "We were *never* inappropriate."

"No, you weren't. But apparently, you're a bit more affectionate than my birth parents were," he said. "And since you raised me, I think I probably take after you two a bit more than them. Besides, I like holding my wife and whispering innuendos in her ear."

Was it possible to die of embarrassment?
That "embarrassment" thought is an indication of just how UNCOMFORTABLE Lois is with Clark's "innuendo" comment.
The "tomato Lois" that you mentioned (which was also written in the previous chapter) is another indication.

Like I said, I understand that Clark is enjoying talking to his wife this way. He is soaking up the sexual feelings for her that he's been denying for so long.
And he loves doing it in front of his parents because they gave him grief for so long for NOT ACTING LIKE A MAN WHO MAKES LOVE TO HIS WIFE.

But Lois isn't 100% this is going to last. To that end, she may be happy to do this with Clark alone, but she is uncomfortable with Clark flaunting his relationship with her in public.
If Clark REALLY wants to make it up to her, he needs to start reading her signals more carefully.