Oh yes!
Like Ludwig said yesterday, guppies breed like wildfire. If she has been in the same tank as a male at any point in the last 6 months, then she is pregnant. Guppies can store sperm for up to 6 months, and use it to produce 1 batch of fry per 4-6 weeks.
In one of those piccies, she looks a lot further on than midway, but then others less so. I would bow to Ludwig's superior experience of breeding guppies with his estimate of timescale.