Her intention was to upset her husband and then laugh at him because he was upset. What kind of mother is she going to be? How can he ever take any heartfelt conversation at face value ever again? I wouldn't be able to continue being married if lying to me and upsetting me was sport.

A 'prank' is saran-wrapping the toilet, covering the doorknobs with Vaseline, short-sheeting the bed. THIS was not a prank. This was cruel. Now OP will forever wonder: is the child mine?

I'd divorce her just on the ground of being stupid enough to think joking about cheating is funny. I can accept many flaws in a partner; stupidity isn't one of them. Stupidity is fatal.

That last YTA is nuts! It's a bad prank that's not in the least bit funny and it should be her who apologises and as for the "grow up and stop moaning to teenagers on Reddit" why can't someone get an outside view? You're horrible to even say that, and you're probably a teenager who thinks nothing of putting people down. Reddit isn't for you or just teenagers you fool! Anyway Rant over! I hope this doesn't split you up. I think as the years have gone by, you've become accustomed to her pranks and you can mostly spot one. I think because of this, she pulled a very stupid thoughtless prank without even thinking of the fact that it would hurt you. Just talk to her and make her understand what she's done. I'd go home and support your heavily pregnant wife. I don't think she'll pull a stunt like this again NTA OP!

This is emotional abuse, if it was a "prank". There's also a good chance she's cheated, told you, and then walked back her confession because she got cold feet. How can you trust her truthfulness when she says she didn't cheat, when she just told you with equal conviction that she did? This goes beyond pranking you by trying to get you to believe a tall story. It's straight up mental cruelty. I would highly recommend insisting on both counselling and a paternity test. She has created a doubt in your mind by confessing to cheating, now you have the right to demand that doubt be set to rest. Brutal truth is, a woman who hasn't cheated, and wouldn't cheat, is not going to sit you down and make a tearful confession that the baby might not be yours unless she straight up wants to hurt you.

She slept with her boss. Do a DNA test.

What's her next joke? "Sorry honey I miscarried and the baby's dead.....wait a minute, surprise! It's fine". This woman is twisted, I couldn't trust anything she said again, she's shown she's happy to hurt people for her own amusement. Major red flag. Divorce and seek custody.

I think there's more to this one. I think OP should do a DNA test when the child is born..

Well ask for a dna test and if she stumbles say you are not joking. Then tell her the pranks stop or all she will see of u is child support and pick ups and drop offs of the child.

She needs to offer a massive sincere apology, acknowledging how badly she f*cked up, get a paternity test to prove she was lying for his peace of mind, set up counseling and swear off all pranks and dishonesty from here on out. Just for starters

NTA. But ... she's ... a load at times, eh? Maybe describing that, this time, due to topic and seriousness of the subject, it did actually, really, hurt you. Is she a bit insensitive at times, anyway, or is that something sort of new, by her? Anyway, ... make clear that some boundaries are there for a reason, and this is one of them, and that she needs to be funnier in future pranks, not just add to the viciousness of it all. Good pranks may make you feel stupid for a moment, granted and all, but this one exceeded this by far. Wouldn't be sure enough to call this a reason to end things, ... child, pregnancy and so ... if you can talk to her, and make believe that you're making believe that this was due to hormones ... so that she gets you're building her a bridge that also warrants the excuse won't be appliable forever, ... that might be my attempt here, so that the overness of it is clear, but without playing power games or a huge load of guilt to be felt.

"It was a harmless prank, and it really hurts me that he would believe the lie I wanted him to believe" is a sentence I want her to really inspect for hidden clues. This is low, down there with grabbing someone near a ledge and yelling, "SAVED YOUR LIFE!"

Disturbing that a woman like this is about to have a child.

this is why pranks should be illegal at the government level, and punsished as if you did the actual crimes.

I would bet very good money that this is just more Bored Panda clickbait BS, which is getting to be really, *really* tiresome. Folks, you should have just stuck with the cute kitten articles, because you are destroying your reputation with stuff like this. And even if it *were* true, this is beneath you.

Yeah, I'd be pranking back with a paternity test. You forgot rule #1, don't put your d**k in crazy.

Pranks are juvenile, they have no place in an adult relationship.

This is a form of bullying - troll them, then double down and gaslight them. F**k off to all the "she's pregnant" people - do his emotions suddenly not count? How is what she said remotely a joke? I'm wondering if she did maybe have an affair and was testing the paternity test waters.

Folks, time to calm down. OP's account has been suspended, and reading a bit more on reddit itself, basically everyone agreed that this was an AI bot posting a sob story to farm karma.

Sorry, but he went to a "speak easy"? What year is this, 1929? Who the hell says "speak easy" anymore? Instantly rings as a work of fiction.