I’m not sure you’re ready to start charging yet.
One thing I would recommend is to learn more about posing, as some of the poses of the pregnant lady are a bit unflattering. Even though she’s pregnant so she’s big, the way she has been posed and the angle she’s been shot from accentuate her size, not just her bump but things like double chins etc. . A few directions from you as to how to pose properly would have made for much more flattering images, this is a good tutorial on posing;
Also i think the skin is over smoothed in places. Especially on the man, which is unnecessary imo.
You’re really lucky in that you’re both doing it together as you can practise things like posing on each other, when I want to practice maternity posing I have to get my husband to stick a cushion up his jumper lol!