I've always thought of whoopee and Collinwood as oxymorons. I mean, really, I can't even imagine anyone doing the deed in that creepy, drafty old house!
However, I feel challenged, so let me think. . .
I doubt Naomi and Josh were doing a darn thing, and losing both kids to sudden death might ruin any romantic mood even if they were.
Frankly, I can't imagine that any Collins family members, or even Natalie, would feel like doing "it" under the circumstances, so I'm going to guess it was the scullery maid, Eloise, and her ardent gardener-lover, Patrick "the rake" O'Neal. She's going to get pregnant and Joshua will send her and her lover packing!
Love, Robin