Ok, I only have vague details from this color movie when I saw it on the FLIX channel as a child:
1. Alien takes human blonde bimbo form and begins to fall in love with a human man
2. The Alien bimbo is there with a brother who has taken a human form and is trying to convince her to help him destroy all the humans
3. There is a gratuitous nude scene where the blond bimbo kills some guy with a tentacle or ray-gun or something
4. The end of the movie involves an explosion of some sort
WHAT IS THIS MOVIE??!?!
Species II, maybe?
None of the species movies--it might be more like 80s. Mustve been 1990 when I saw it
Perhaps "Invasion of the Space Preachers?" Some of the facts fit. If not, do you have any more information? Especially other characters, the setting, if you can remember any of the production values or such.
Here is a reader review for "Invasion of the Space Preachers:"
http://www.badmovies.org/othermovies/invasionpreach/
Thats all the info I have. The production value was not bad. It is not the space preacher movie.
Sounds a little bit like Decoys - there were aliens that took the form of hot babes on a college campus, seducing men. One of them fell in love with one of the college guys. The babes sprouted tentacles. It ended with a scene with fire, though i can't remember an explosion. But there was no brother, just the girls and the college dudes.
Thats it!! Thank you!