is cyber sex cheating?

ok update, my friend found out whats been going on, hes been looking at porn, she walked in on him, shes now told him how she feels and hes now taken notice.
hes promised her hes not cheated, hes gonna have a mobile so she can phone him any time, she can go to the pub with him, hes given her the number for the pub so she can phone and make sure hes there.
hes now taking her out once a week and making a fuss of her.
he said he started to feel like a slob and that she didnt fancy him anymore so thats why he started making an effort with how he looks.
for over a year after she had her last child she pushed him away all the time and didnt want sex so he was also feeling bad.
she has also admitted that its as much her problem as his as she feels insercure and tells him not to do things so he then does them behind her back cos he knows she will go mad if she finds out, silly things like she told him to stop going to the gym so he went but lied about where he was going so she then started to think he was cheating.
i hope they do sort things out, fingers crossed.