Don't worry just a little would do no harm if ure still in ur 2nd trimester and tt ur pregnancy has no complication so far. Only in the 3rd trimester aft 35 wks, will need to be careful. I was at my 39th wk, not dilated yet and my gynae encouraged my hubby to make love and do hand expression for the boobs to induce labour. 😆Eventually I only did the latter to store colostrum for my baby and labour started 3 days later.