I mean, did you say sorry?

Jokes are great, but everyone fumbles at one point or another. Also, humour changes dramatically in online groups (and over time). Some might be cool with "your mom" stuff, some, less so.

The ability to realize you hurt her feelings and just say sorry for that is KEY to maintaining good relationships.

It's also ok to realize not all friendships are what we think they are, or work as well as we might hope. Humour doesn't match as well as we thought, or values are different, etc. That's just being human. Be the best you you can and don't worry too much.