ayc: It is brought that often (like with Chana from the Chanuka story) that a husband would “accuse” his wife (with her cooperation) of being a sotah, in order that they should receive the blessing of having children, if they had trouble having children till then.
Also, she can’t demand a get for being (falsely) accused of being a sotah, as it isn’t one of the valid halachic reasons that would entitle her to demand one.