Keep your hands and your dicks to yourself. That is how she got into this mess in the first place.
Try and touch her belly.
A good rule of thumb is that you probably shouldn’t touch any woman in public, especially if you don’t know her that well. I have taken this rule even further, and never touch any woman, at all. If a woman is doing her humanitarian duty by bringing more people into this world, she deserves to be left alone, untouched, especially on the parts of her body that are likely to have stretch marks and an infant inside them.