Brian Austin Green is not holding back when it comes to his estranged wife, Megan Fox.

Hours after Megan became Instagram official with rapper Machine Gun Kelly, Brian decided to highlight his love for his four sons on his own account.

“Achingly beautiful boys…… My heart is yours,” he captioned the post, referring to sons Noah Shannon, 7, Bodhi Ransom, 6, and Journey River, 3. The post also featured son Kassius, 18, whom he shares with ex Vanessa Marcil.

However, if you look closely, Brian is mocking Megan’s photo caption.

Megan’s original caption with her new boyfriend said, “Achingly beautiful boy…… My heart is yours.”

Wow… that shade is not so subtle. Still, we hope they can be civilized for the sake of the children.