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When One Direction's Louis Tomlinson learned a woman he'd gone on a few dates with was having his baby, he pledged his support, flying from various parts of the world to be at Briana Jungwirth's side for ultrasounds and other milestones.

But now that Briana and Louis' son, Freddie Reign, has arrived, Louis has reportedly begun to question the nature of their co-parenting plan.

Insiders close to the singer tell TMZ Briana wasn't allowing Louis to see the 1-month-old, even though Louis bought her a three-bedroom home in posh Calabasas and rented a $21 million home nearby so he could be near the infant.

Fearing she's after more of his money, Louis armed himself with lawyers and intends to request an order mandating that Briana give him "custodial rights" and "significant access" to Freddie.

Hours before the formal custody hearing in a court room on Feb. 26, Louis and Briana reached a temporary custody agreement.

According to TMZ, under this new deal, Louis will have access to baby Freddie for a few hours at a time during the week, but there won't be any overnight stays yet.

Lawyers for both parents are still hard at work creating a more formal custody arrangement about time spent with Freddie and, of course, money.

Shortly after the baby's birth in January, sources said Louis was happy and expected Briana, who works in Los Angeles as a stylist, to be "an amazing mother."

Asked how he felt about fatherhood at the Brit Awards this week, Louis told ITV2's Laura Whitmore, "it's intense but it's great."

Despite TMZ's report, the singer also said the awards ceremony marked his "first time away from Freddie," and called the distance "tough."