[Marvelous]

And from how to fake a pregnancy on WikiHow:

If you want to fake having twins, go for a slightly bigger belly and, hold the belly frequently. It'll look like you are having a little more caution because you have two babies. (actually, 9 months bellies are quite huge & I acted like I was about to drop the baby, but keeps holding it on, it's round but bigger than a basketball or bowling ball. And remember, when people say I'm BIG, I know they meant it's BEAUTIFUL!)

Observe how pregnant women walk, sit, bend down (and sway like a bell or shake while I attempt to still stand).

Walk with a waddle and keep your legs wide. When you sit down, spread out your legs. (similar to a duck walk).

Rub your belly frequently and smile. (Don't do this only when people are looking because then it will be obvious you are faking. Lots of that, also much smiles, & a little bit of laughter, apparently I like to receive this attention).

Be conscious of how you sit and bend down/over. (and lay down, with the big & round belly pointing out high).

Little detail, add a popped belly button. It makes it more realistic. (the outie, a prominent feature of pregnancy).

If you are really trying to get someone to believe you are pregnant print out an ultrasound from online and go around maternity stores and baby clothes stores (Maybe they will bump into you). (On my babymoon, I stopped by a maternity clothing store to buy a [lime green] dress, the wife introduced me to understanding staffers).

Put some blush on your face (dark red-bronze) You may want to add some on you arms too because some pregnant people have a change in skin color. (I've heard pregnant women...and myself genderfluid...face glows).

Go online a look up how pregnant people move. Practice the motions with the "bump" on. Practice in front of people! (Like my wife, who thought it's funny, cute & naturally pleasing...she has been pregnant 3 times herself).

Pregnant women are usually pretty moody. If you're going to act pregnant in public (or in front of people anywhere), you may want to act sensitive and/or defensive to certain remarks and possibly be apt to cry when something sentimental happens. Also, pregnant women are usually achy and sometimes their ankles are swollen, so sometimes walk with your hands on your lower back and occasionally throw out a complaint about your back and your ankles. Also, you might throw out a few complaints about your extra weight and be sure to act fatigued. Another trick is having difficulty getting up out of chairs and couches. (Well, no incident warranted me being a hormonal b1tch, but how to respond in a humorous comeback style, express pride, self-esteem & body positivity. I did that many times & would say "Man, I'm having aches, but it's all part of this", & "I can't believe I'm so huge, but I love it a lot." I pretended to be out of breath when I keep sitting down or laying flat on the bed. And to get up slower, act like it's uncomfortable, and finally, huff deeply, resembling hard Braxton Hicks movements).

Pretend to have food cravings and aversions (I done this both, not sure what kind of 6-meal-a-day diet I'll have).

And finally, pretend you need to use the restroom (increased urination, constipation, and even vomiting), as well express that you have gas (belches, since you can't really fart). (2 liters of soda can lead to headaches, burping & really having to pee, all common traits of pregnancy, added weight by the fake belly made my body feel warmer).