Ahhh! That'll be Demon Seed . The computer wants to impregnate her. I don't recollect the appearance of little half-human/half-robots. It was open-ended I think.
I'm not sure it rates as a great movie but I expect the gentlefolk of this forum will find it more 'worthwhile' than the wider public would
It's a book by Dean R Koontz, which I haven't read, but maybe that's worth checking out too?