Is this a "red flag" or simply overreacting?

If while making out with someone, (crossed the 3 month mark) the person tells you "if I don't stop now, I'll assault you." would you consider that a red flag or would you think that it's considerate that they told you? Is that just "sexy talk?"

it made me uncomfortable tbh, but I don't know if I'm just overreacting and too uptight.