I really like the headcanon that:
A. Anakin and Padmé were absolutely rubbish at being discreet about their relationship and didn’t even realize it
B. Obi-Wan figured it out himself early on because he isn’t an idiot, and didn’t say anything in the hope that Anakin would eventually tell Obi-Wan himself
C. To make sure Anakin and Padmé’s secret, already poorly-kept by the idiots themselves, didn’t get out to the Council (resulting in Anakin being kicked out of the Order), Obi-Wan found himself having to constantly make distractions for the other Council members when they came close to stumbling upon the truth (which wouldn’t happen so often if you would stop KISSING YOUR SECRET WIFE IN PUBLIC, ANAKIN), including at one point taking Mace Windu out for a beautiful evening at the Galactic Gardens
Mace Windu spends the next few weeks annoyed Obi-Wan hasn’t asked him for a second date.