Is sending nudes considered cheating?

I know this question is asked a lot but my wife told me to ask reddit so here I go.

To start off with, my wife is the one that sent a nude. She did it strictly for money (a lot of it) and she doesnt feel like she cheated. I will go into details of why she doesn't feel like she cheated and how this all came into light.

Backstory:

before we were together, my wife used to be a high dollar escort. Surprisingly few clients, but a lot of money involved. She has sense left that life behind because it didn't make her feel good. She moved far away and started a new life.

Shes had several serious relationships including a marrage since then.

Then I come into the picture (also far from my home state)

notes on me: a large majority of my friends are females that i met through dating websites and there may have been flings but Ultimately things settled to just being friends (many of them i am very close with) and because i had already seen a lot of them naked, they would casually send me nudes from time to time.

when my wife and i first got together, i was honest (as was she about her past) and i said i would tell them to stop sending me nudes because i was in a relationship. My wife told me not to tell them that because she didnt care for several reasons. one being that everyone likes nudes, one being that i was like their hype man and she didnt want to take That away from them, one was that she didnt feel threatened by any of them because of how far away they all were anyway. there were a variety of reasons. so i didnt put a stop to it.

several times early in our relationship i revisited the topic to be sure she was okay with it and each time she said she was.

the Second time i brought it up i said "okay well im still not going to be sending out any dick pics or anything like that and i dont really want you sending anything either" and she said "who am I going to send nudes to? my ex? i dont talk to anybody" (which is true she does live a very secluded life)

the third time i brought it up she again said she was fine with it and i again said i still didnt want us sending nudes and she said again "who would i send nudes to?" to which i just laughed and said good point.

fast forward, she gets pregnant, we have the child,were only together around a year at this point shes been pregnant most of our relationship.

at one point i use her laptop and i see a text thread on it from someone with her best friends name and it is an innapripriate text and its from a guy, but the text thread is only like 10 messages so its been deleted recently. i knew Something was up at that point.

one night she gets super drunk and passes out so i go into her phone and look at stuff and discover this person is one of her old escort clients, and he has been paying her a lot of money and she has been very loosely sexting him, (and by that i mean she is very disengaged with the conversation. very short responses, not really participating much, but i guess this guy still liked it because he was paying). at one point he wanted a picture, and she sent him a picture of her tits. That was the only nude I saw in their current chat. There were a LOT of other times where he asked to ser stuff and she always had an excuse why she couldn’t or he Would pay for a video and then she would bail and keep the money. also the whole chat was filled with lies on her end, lieing about where she lives and what shes up to and stuff.

well i confronted her about it and she was honest about it and answered a lot of my questions.

she told me shes been talking to him throughout our whole relationship. mostly only text though, because she was pregnant and wasnt about to show him that. She also said she had been talking to him throughout her whole previous relationship as well and her marrage, and told me she sent him pics and vids during those relationships as well.

as for the nude she did send during our relationship she says she honestly doesnt remember sending it (Which considering she drinks a bit and has forgotten other large things i do believe she doesnt remember it but that doesnt messesairly excuse it) but again she did it strictly for money.

the reason she always deleted the texts was because she does that to all her text threads because She runs a business and it gets too cluttered if she doesnt (which she actually told me about at the beginning of our relationship and i have seen the overflow of texts she gets for work and its a lot) so that answers why it was deleted. as for why she was doing it to begin with, it was all for the money. the guy is old and kinda stupid and according to her an annoying narcissist. shes debated dropping him several times (which i saw in the texts) but then he offers more money and she just rolls with it.

the whole thing was a pretty calm discussion but ultimately she says she doesnt feel like she cheated because it wasn't emotional or physical, it was strictly sex work, it was a lot of money, and the fact that she didnt care that people sent me nudes.

i told her the difference was i offered to end the nudes and she told me not to and basically consented to it, but her sending this guy nudes was done behind my back

she still insists that she didnt cheat though and she told me to ask reddit. so here i am asking reddit.