Embarrassing Secret
As a rule, Crowley and Aziraphale didn't keep secrets from each other. Secrets were silly really. If you had such a strong desire to keep something a secret from your lover, then the relationship was likely not too strong to start with.
Still Aziraphale had a feeling that Crowley was hiding something from him, which was worrying to say the least. It was a bunch of little things that were snowballing into a big ball of worry.
For one, Crowley had been more protective of his phone lately. Not in a massively obvious way. It's just… sometimes he would turn his phone over during meals or hastily cover up his screen when Aziraphale walked past. And Aziraphale had noticed a few charges on their credit card account that he didn't recognise.
The was also the matter of Crowley coming home late some days with no excuse as for where he was.
Even though Aziraphale hated to admit it, he was worried that Crowley was cheating. It wasn't a completely implausible, Crowley was a demon after all. Lying and deception was practically in his blood.
Aziraphale was shaking with fear and anger when he confronted his lover. He had laid out all his evidence. Weeks of little things that were bothering him. Crowley had listened to everything and immediately apologised.
"I didn't want you to find out until it was done," he said. "But Anathema was teaching me - god this is embarrassing – she's teaching me how to knit. That's what all the texts were about. Also, I was visiting her and Newt's place so she could help me out with the trickier bits."
"You were knitting?" asked Aziraphale incredulously.
"It's silly really. But I noticed that your favourite jumper was getting a little worn out, so I thought I'd make you another. And then Anathema offered to teach me how. I'm sorry for making you worry."
Two days later, Crowley hands Aziraphale a wrapped package. Opening it, Aziraphale found a soft woollen jumper, knit with blue yarn. It was by no means perfect – there were plenty of dropped stitches – but it was a touching gift.
This starts a sort of tradition between the two, were Crowley gifts Aziraphale a new jumper every year. It is safe to say, Aziraphale is quite the fan of this tradition.