First of all, this relationship is absolutely not okay. I am assuming he is married, since you mentioned children, and the fact that he is flirting with you means that he is either unhappy with his mate, or he just likes to flirt with other women. He could easily leave the relationship to be with you, but be warned. If he could easily leave the relationship with this other woman to be with you, then he could easily leave you for another woman. I hope this serves as a warning to you.
Believe her or leave her
It might. If it does, tell him to remember he has a wife and that he should leave you alone.
Abandonment.
Tell the person you would be better off as friends.
When you don't love them anymore, or the addiction is so harmful to your relationship, it is emotionally and physically damaging to you or your children.
That means she's planning to cheat on you, or she wants to move onto another guy. Or it means she doesn't respect you, as she tolerates another guy flirting with her. You should tell her, and if she says she doesn't have the heart to leave him, it means she puts on her "friend" more importance than on yourself, which means lack of respect. If she doesn't want to stop talking to him then you should leave her, or if you like her a lot, then go and talk to the guy or actually shout at him, and if necessary beat him up. Flirting when in a relationship is completely unacceptable. That's being a slut and having no respect for your partner.
AnswerSome women can, others can not. This is dependent on your situation, and the relationship that you have with your children. Often, if they are close to your abusive partner; taking them will not be an option. That would only become an option after a court case. Taking your children with you is often a favorable decision, especially if they are young. However, if taking them increases your chances of being hurt - do not do it. The most dangerous time in an abusive relationship is when the victim leaves, so do not place yourself in additional danger. You must assess the situation.
Reasure him that it will work out. Example: If you want children and he is having second thoughts to the point he wants to leave, reason with him, like no children after marriage
saliva
I have owned two English Mastiffs. I would leave everything as it is. My children seem to do better with the dog around. The dog also does not want to leave the children.
Fight back, press charges and leave.
If they want to leave the relationship and they are being severely beaten, then the police can help. However some people are not ready to leave the relationship.