What can we tell our client about our findings here in these channelings about her extraterrestrial involvement?

Your colleague, who has talked with her and referred her to you, is aware of alien involvement and is deferring to you to break the news. If you do not, she will do so. You are boxed in here and must pay the price of being in the line of fire with respect to karmic consequences of a revelation. What we would suggest would be to mention to her that there has been extraterrestrial involvement and for her to know you have applied much healing work to sever these ties, but she must also want this to happen and not become involved in any way with organizations allied with the extraterrestrial question, as this invites her being noticed, and this could lead to more interference with her in order to reel her back in. It is not in her best interest to have any kind of interaction. It will only cause problems for her and her soul because she would be working in opposition to the interests of humanity in supporting them in any way whatsoever. That is a strong statement, but nonspecific as to the dark details, and is the best you can do in fulfilling your karmic obligations here.