@Maisy2012
I put up with similar crap for 17 years, do not be like me and waste your life away.
The first time I caught my husband and I threatened to leave he threatened to kill himself and that set the tone for our whole marriage.
He started in our first year of marriage.
Time and time again he did it but they get clever, they delete messages etc but then they get lax and forget and you find out again.
My husband promised and promised to stop, he cried and begged but he didnt stop.
After 9 years of marriage and after catching him for the umpteenth time I started making plans to leave 8 years later when our daughter turned 18.
At that point I stopped checking his phone or emails but in 2018 when our daughter was 15 I caught him again and this time I ended the marriage.
We are now divorced and he is really struggling with the fact I left him, he thought I would put up with.
In his words 'it was an ego boost and he would never have left me for any of the women'
Men like him and like your ex never change, they are always looking for that thrill and ego boost.
He does not value you or respect you.
Please respect and value yourself and give up on your marriage.
The only reason he is not admitting the oral sex is because there is no proof, if there was such as messages he would admit it.