It's the hazards of having so many omegas in close proximity for so long. They tend to synch up.

It's Jason's first heat after coming back into the fold of the Bat Pack and predictably no one else is around when he needs them. No one but Tim.

“Quick! How do I help an omega that’s nearing critical heat?” Jason asked. “What?’ Roy asked. “The hell ya need to know that for?” “Because I got one with me right now and-- Ah!! Hands! Hands!” Or the one where Jason goes to drop off groceries at the Nest only to get dragged into helping Tim through a critical heat while Roy gives advice from the sidelines.

“We need you to Claim Tim.” Jason’s shirt falls to the floor as he turns around to stare at the acrobat, “What the fuck.” “Yeah.” Dick runs a hand through his hair with a manic giggle. “That’s fair.”

Not long after his confrontation with Bruce and the Joker, Jason crosses paths with an angry Poison Ivy. She accidentally triggers his heat before leaving him for Robin to find. Still scared and angry about the incident at Titans Tower, Tim has no choice but to help Jason work through his heat when it turns out that he's been abusing suppressants and could very well die without an alpha to help.

Jack Drake catches his son sneaking in through the window, and jumps to the wrong conclusion.

Tim flees to Titans Tower when his presentation heat hits. Jason doesn't know how this became his problem.

Jason's had worse heats. Don't ask him when— but he's sure he's had them.

“I want you to bitch me.” Tim reacted to the word so strongly he nearly fell off his chair. “Kon you- you can't say that!” It wasn't a word one should bring up in polite company, Tim had learned early on. Kon rolled his eyes emphatically. “Fine. I want you to help me transition my dynamic into one that more closely resembles how I feel inside. Happy?”

So Dick couldn’t go to his alpha, and Jason couldn’t go to anyone. Hadn’t needed to, not in years, but this heat—it couldn’t be put off much longer. And there were no other omegas in the family. (It stung, sometimes. That Bruce hadn’t trusted any omegas after them. After Jason. He wondered if Dick had noticed, too.) So yeah. They only had each other, and it was fucking awkward.