Eeeeyup. That’s your sign that momma has some buns in her oven
Congratulations!
I’m not sure if this was already covered, but I just want to point out that guppies are livebearers as opposed to laying eggs. When she pops you’re gonna have little guppies swimming around and they will contribute to your bio load more and more as they get older, and a Spec V is fairly small. Definitely keep this in mind as you plan for the future. Removing and selling/gifting the fish is an option, as is getting a bigger tank. A lot of people tend to get overrun with guppies fairly quickly if they don’t keep their numbers in check.
But for now just sit back and enjoy the miracle of life! Pretty soon you’ll have little adorable babies swimming around!