No Bumps In This Relationship

(I am at school with my girlfriend, not long before our nine-month anniversary. We stop to say hello to a teacher we both had years before. I decide to tell the teacher about our upcoming anniversary.)

Girlfriend and I: *together* “Hi, Mrs.[name]!”

Teacher: “Hi!”

Me: *hugging girlfriend* “Almost nine months!”

(Our teacher looks at me strangely, and covers her mouth with one hand.)

Me: *realizing what I said, and blushing* “Uh. since we started dating!”