Brian Austin Green will always defend Megan Fox.

On Dec. 10, news broke that Fox, 38, and Machine Gun Kelly had split just weeks after announcing they were expecting their first child together, and Fox’s former husband was shocked to hear about the split.

In a video posted by TMZ, Green, 51, who was married to Fox from 2010 to 2020, said he had “no idea” about the couple’s split before sharing his thoughts on the split.

“How old is he? He’s in his 30s, right?” Green asked the reporter, who claimed the singer was unfaithful to his former fiancée. “In your 30s, I don’t know, growing up, you know? She’s pregnant.”

“I just want the best for her, I want the best for the baby, I want the best for our kids,” Green continued.

He called the split a “disgrace” and said he was “heartbroken” to hear about it as Fox had been “so excited” about her pregnancy.

He also revealed that their three children – Fox and Green share sons Noah, 12, Bodhi, 10, and Journey, 8 – are “so excited” to welcome a new sibling as well.

Green responded to the breakup news after a source told PEOPLE that Fox is “doing well” with her ex and his wife Sharna Burgess and she is “so happy to be pregnant.”

“She gets on really well with Sharna. Megan trusts her around the guys,” the source said of Burgess, 39.

“Brian is also a great father. Megan is lucky that her boys are loved and always cared for.”

Fox told PEOPLE earlier this month that her sons are “very excited about adding another addition to their family and have promised to pitch in and lend a hand.”

She also talked about how she’s coping with her fourth pregnancy, saying she’s “already learned all the tricks to make my body feel good physically and mentally.”

“I’m sleeping and exercising and sticking to my healthy diet and lifestyle as always,” she said.

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Fox was apparently “blindsided” by her split from the singer, who she has been dating since 2020 and got engaged to in 2022.

A source told PEOPLE she is “distraught” but is trying to focus on her pregnancy, which is “her priority” right now.