What harm can it do to the baby or woman if the boy ejaculates sperm into the woman while she is pregnant?
When a woman becomes pregnant, a plug made up of a thick mucus forms in the cervix at the entrance to the uterus. This plug keeps the baby in a relatively germ-free environment while it is developing. The same plug also keeps out sperm from the husband. A wife can enjoy sex up until a few weeks before the baby is delivered. Near the time for a baby to be delivered, the vagina stretches to make room for the baby and the stretched vagina makes sex difficult. A few weeks after the baby is delivered, the vagina returns to its normal size and sex can resume.