I thank everyone that contributed to this,infact I have been able to loosen my heart of some burdens.
I have picked the few things I would need from the few that made much sense.

Some feel I am pleased with my dad,no I am not,we have fought over it severally and he has apologised several times but what is the point of apologising when you are unrepentant. I am the most bothered because I'm the head,my lil sister has since stopped talking to him,my other brothers only greet him once in a while.
Someone talked about his 'will',I found that funny because it is only a lazy man that will depend on his father's wealth and I'm not.

Some also mentioned she may have been wayward from young,nope. I would say she is a victim of love and deceit,early marriage without knowing what you want yet or how to live with a man ,she is of the old-school where a woman still kneels to give food to her husband, married as a virgin to an ordinary primary school teacher,she practically lived most her life for him and all about him. He was humble until he started making money and couldn't handle it,he swore with everything that she has been a good woman and never did him wrong. I could only infer that he didn't love her if not he wouldn't be that careless.

It is just saddening anyways,thanks and remain blessed.

Nwodosis:
Your Mum and Dad are in what is called Polyamorous marriage! You better allow event to take care of itself, confronting you mother is exposing yourself to fury of a woman who has been in dejection. But guy, you no also try o, evading your mother's privacy.

Anytime I visit home,I help fix one or two things on her phone so I get tempted to check things she is up to.

carammel:
Well,I understand if you dont want your mom to leave,that may give room for open affair since she would be living alone and since we are in Africa,she will turn to outcast by mere doing that and you lot would call her all sort of names.
Allow the woman be sir and face your own family, just try as much as possible not to go the way of your dad. He is a very bad example but a good example of most African men.

You are right in the part that her living alone would bring about open affair.
lol,ma I can't be like him at least I'm married and I love my family,my wife does not deserve to be hurt and I can't stand my kids having emotional trauma courtesy of me.

PaperLace:
1. Your dad is/has been a chronic, irresponsible, unrepentant and insensitive cheat.
2.He has subjected the innocent woman to all sorts of emotional and physical abuse, even from third parties (his side chicks).
2b. All for no fault of hers.
3. He is currently with one of his side chicks.
4. Their sex life is dead.
5. Your mum wanted to leave the marriage, you told her not to.
6. Mummy is beautiful and fit _halleluyah somebody!!!
7. Mummy is independent and strong.
8. Mummy is moving on with her life (albeit wrongly) and you're not happy.

What kind of son are you bikonu? You don't want her to leave the marriage, you don't want her to move on. What do you want? Disrespecting her vows is NO-NO, so _ allow her leave. She should have one steady partner and not multiple, that's the only thing you should be advising her on (If at all you should advise her).

Did it ever occur to you, that just like so many married women, with community horsebands, your mum was waiting for her kids to grow within a complete family syst
em(as society demands) before divorcing? You still decided to stop her.

This is why it's good for women to be independent and remain physically appealing. All that "who will want you after 3kids" threat, na for women wey no know wassup.

Soldier come, soldier go _barracks go remain.
This na open marriage Season1.

wow,you grab everything even up to what I didn't put there.

I really dont like the idea of her living alone,it could give room for many men visiting her and I can't stand such from my mom.

I am a guy of 34 and I'm married with 2kids.
I have been going through my mom's phone for a while now and things I see on it are too bad. She has been having sexchats with 3 different men, I am most certain she has met and had sex with one of them.

Background to the story....

My dad has never been the very responsible type, a chronic womanizer and he was always hurting her because she loved him to the extreme. There had been cases where she was even arrested by the police from one of his side chicks who he sponsored through school till she graduated, also a time he brought another one home who engaged in fight with my mom and nothing was done by my dad. There are so many cases like that whom i may not be able to say much on to avoid long story.

As I write this now, he has been out of the house for the past one month living with a girl of about 24. I called him severally man to man to know his motive and he said he can't just explain it but mom has not wrong him in a way because she is a good wife who knows how to take care of her man.

My mom is very beautiful and looks younger than a woman in her fifties so it is not unexpected that other men would hit on her.

I took time to imagine walking in her shoes and I understand she is really hurt, she has asked to leave his house several, I've been the one calming her down and advising her not to leave at her age. She is independent and has a good job, and according to her there is no sexual relationship between them again.

Now I know she is flirting with these men due to loniless and several heartbreak but then, it is disgusting to me that my mom is involved in that even to the point of sending nudes, I saw all these and I am just confused on how to handle this matter.

Should I confront her or just keep mute.