"Momma" is still crying and has cried regarding Reilly many a time. Even in those moments when, for example, "Momma" wonders about a helpmate for herself and a "Daddy" for Reilly, she knows that time passes more quickly every day (even when it doesn't seem like it passes) and that every day, even closer to the day if and when "Momma" does find a helpmate and Reilly's "Daddy"*, is a day closer to "Momma"'s and/or "Reilly"'s death unless God wills that they'd be raptured (and thankfully, animals do have souls).
What do other pet owners do, meanwhile, as they reconcile, deal with, or do whatever it is as they're torn or trying to balance their respective worldviews (faiths/religions/philosophies) and the hopes that their worldviews give them (e.g., Normative Judaism and Christianity; the World to Come, and the Resurrection of the Dead and Messianic redemption at hand) with the reality that the even the best-cared-for and longest-living pets may or will die someday and/or even outlive their owners before they would or will die?
That's something that's honestly kept "Momma" alive for Reilly's and her own sakes, meanwhile—what would happen to Reilly if "Momma" died and left her behind?
* "Momma" still hasn't given up on the one person whom is Reilly's possible "Daddy"—maybe the hopeless romantic in her and the upcoming Valentine's Day explain a part of it.