Any suggestion on the outfit for maternity photoshoot? Have no idea what to wear!

For no.1 i took semi nude maternity photoshoot with my hubby. But the pictures we kept them to view by ourselves only for memories. For no.2, I just wore a black tube and short pant and took with my no.1 and hubby. For no.3, I wish to have a more dreamy theme like wearing long clothes as suggested by Jamie