Now, suppose there was a group of hyper-intelligent ants living in a woman's house. Their first goal would be to remain unnoticed, because humans tend to kill ants. Finding a chance to demonstrate intelligence would be difficult before the human would kill them, yet finding opportunities to eat food is more difficult with this as a concern. Now, suppose these hyper-intelligent ants are nice, friendly ants who are willing to recognize that since most ants are not hyper-intelligent and lack awareness, such actions should not be punishable. This is just as well, since I'm sure you've heard of what happens when unintelligent ants attack humans en masse. It's rare, but it does happen once in a while.
So, the next question is how the ants go about helping the human. The answer is, they clean up her house when she isn't looking. Trash is mysteriously discarded, clothes are folded, etc. They're at the stronger end of the spectrum of ant species, but most of their abilities to perform tasks stem from immense teamwork, much like cartoon ants carrying away apples and the like. This has the interesting side effect that the human is unconsciously a bit messier, which gives the ant colony greater food supplies. She does eventually notice, but attempts to catch them are all unsuccessful. When searching for house-brownies, humans never see the well-hidden ants, not that they'd think to consider the ants to be their assistants. No attempt at stealth can succeed against an army of thousands of attentive ants!
Now, let us continue this fantasy and suppose that the ants' superintelligence comes at a price. Unlike normal ants, some of their genes deteriorate over time, mainly because there are not enough of them and they are forced to reproduce with other ants outside their species frequently to reduce inbreeding. So, despite being a heavily dominant trate, they cannot go indefinitely without some sort of resupply. The main symptom that their genetic material is becoming too diluted is seeing many ants showing up without such intelligence. Their intelligence, on the other hand, comes from humans. It is not possible for them to breed with a human against the human's will, since a human's body will reject the ants if she is overly stressed out and such. It's a very fragile pregnancy. Now, a female vagina is far too large for any one ant to penetrate effectively. The pressure and overall inhospitable environment makes it difficult for ants to perform sexually. Besides, successful performance just doesn't release enough sperm to be effective, and crawling in deeper to for that extra boost in in reliability tends to cause internal agitation, which is dangerous for the female's eggs and makes a successful birth unlikely.
.... There is more of this story ...