Would you be upset if your guy keeps liking a certain family friend's photos like this?

Marilyn
****This is not the girl . But this woman takes photos like this or more provocative and my guy presses like on fb or like on Instagram. The woman is his brother's ex as a matter of fact.  The bro and the girl were friends after and the family as well. But my guy always likes her sexy photos . I find that disrespectful friend or not. Would you tell him to block her if he don't stop? I could see if she post a picture of a bagel and he likes it but sexy that kinda bothers me after too many likes. 

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