Problem regarding my parents

Maybe butt out and let them deal with it themselves. They're grownups. Unless someone is being abused, this is their problem and not yours.

By the way, if either of them try to get you to take sides, tell them no and then either leave the room or change the subject.

What Jespah says. This issue is between them. They need to work it out between them. Inserting yourself in any way will not help.

Tell him to take them out of sight round the back.

Thank you all for your suggestions. Problem is solved. We have changed our house where there is no other ladies

Do you mean he is watching other ladies walking by the front of your house/

or that he looks at other ladies passing by the front of your house?

In some cultures, "seeing" can mean to meet or date someone.

I rather disagree that the issue is just between his parents. Not only is it affecting him, but the behaviour (seeing other women off in front of the house - presumably the wife suspects him of sleeping with them) is quite rude (in my view, it's quite despicable behaviour).

I'd have no issue calling out anyone that behaved like like towards a loved one of mine, even if he were my father.

The conversation of course, is about the rude behaviour, and not about the state of their relationship.

And of course, if the OP didn't mean that (that's what I think he means), then disregard