Jay-Z and Solange Knowles are at each other's throats over Beyonce's delivery

Beyonce revealed that she is pregnant with twins on 1 February.

Beyonce had recently announced that she and Jay Z are expecting twins Reuters

Jay-Z and Solange Knowles are allegedly not in good terms. According to a report in a celebrity gossip website, the duo are "at each other's throats" over who should be by Beyonce Knowles' side when she gives birth to twins.

A source told Radar Online: "Solange has really been with Bey a hell of lot, doing prenatal yoga classes with her and rubbing stretchmark oil all over her."

"Jay's insisting it's his job to be there during the birth and wants Solange outside in the waiting area," the insider added. "It's turning into a real standoff and bringing up a lot of past ill will, which is probably why neither of them have thought about asking what Beyonce wants!"

"Now Jay and Solange are back at it and their relationship has turned into a real power struggle," the source continued.

In May 2014, a video of Solange physically attacking Jay-Z emerged, after the Met Gala. Following the incident, there were speculations that the couple are planning to divorce. Adding on, there were rumours that Jay Z had affair with Rachel Roy and Rita Ora, and are the "Becky with the good hair" women mentioned in Beyonce's song, Sorry.

Meanwhile, Beyonce is taking utmost care of her health after she revealed that she is pregnant with twins. On 1 February, the Single Ladies singer shared a photo of her holding her bare baby bump on Instagram. Beyonce captioned the image: "We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. – The Carters."