Nope! It'll even trigger labour :) as long as your water is in tact your good. I'm 2-3 cm and lost my mucas. I'll be seducing my fiancee when he gets home from work at 430am. Semen softens the cervix and if you orgasm it'll trigger contractions.
No sex is good for you unless your doctor says stop bc if a medical reason I would say bonk on!!! Less chance of getting induced bc *** softens your cervix up