Judging by the ending, they all got pregnant. But in the game it is not.
No
NVM - actually found it near the entrance to the woods (to the left). Maybe it shifts around?
It is not difficult to notice. It's random. Look in all locations in the forest. First, I advise you to check the first location where the teleport is, and the penultimate, before the one where the game ends. (You can get there through the teleport, which is located at the entrance to the castle, next to the Parking lot.)
Lisa is beside Karen in the Super Secret Sex Chamber. Just click on her to enjoy a very brief sex scene. Personally I'm disappointed with the "Super Secret Sex Chamber" because it doesn't add much game play and the rather crude animations are far too brief to contribute much entertainment to such an epic game. I did enjoy seeing Karen again though, my favourite NLT girl from the earlier series of comics. I can't help wondering whether any other women from the comics and Lust Epidemic will eventually turn up in Treasure of Nadia (particularly Joan, Lisa and especially adorable Karen) since Piria, Val and Brad have already made appearances as a main character (Piria) or in cameos (Valerie and Brad on holiday in Cape Vedra from Amber's mansion). The NLT girls from both the comics and Lust Epidemic are just too good to throw away.
One in the basement, where there are two buttons on the wall. Another in the forest, where the chest.
Need to look for spare parts for the radiator. But I don't remember where they are.
I didn't got boots I turned off the security system but still some lasers are working hence the boots are still locked
