Harry Potter and the Connubialis Hex/Hogwarts Express/Lavender, Parvati and Padma/Join the twins/Beckon Ginny in/Let Ginny join them/Tells all the girls to strip
From Create Your Own Story
The girls immediately start to remove their clothes.
Parvati and Padma take turns stripping each other. As they take off each layer of clothing, the twins caress each other. Harry can see their nipples stiffening under their bras, and then they remove those as well, and their chocolate-colored breasts are exposed. Harry wants to take them into his hands, massage them, lick them, bite them, but he is caught short by a motion out of the corner of his eye.
Lavender has wasted no time in stripping down completely, and is rubbing furiously between her legs. Harry sees the blonde wisps of her landing strip. She moans softly as she works her hands around, bucking her hips slightly. The motion causes her luscious breasts to sway and jiggle slightly.
Looking at the seat next to him, Harry sees that Ginny has already unclasped her bra and pulled it off, showing off her freckled chest. Harry's cock stirs a little in response. She starts to undo her jeans, and Harry helps her shuffle out of them, stroking her thighs and crotch as he does.
Harry is in a locked compartment with four naked girls. What does he do next?