Yes she looks pregnant.
Female livebearers (mollies, guppies, platies, swordtails) that have been kept in a tank with males, will normally be pregnant. The females can carry up to 6 sperm packets in their body from previous matings. They use 1 sperm packet per batch of eggs. The gestation period is about 4 weeks (1 month) after which time, the female will use another sperm packet to fertilise the next batch of eggs. Because of this, female livebearers can give birth for up to 6 months without any males being present.