[Brandye]

During the first trimester of pregnancy, many women lack interest in sex. The pain, however, is an unusual symptom and should be checked.

As a general rule, during the first trimester many women are uninterested; the second trimester, many are very interested; the third trimester is anyone's guess - some women are really interested and others are not at all.

You two can certainly devise some mutually acceptable arrangements. See the sticky on Sex and Pregnancy.