What Causes Excessive Vaginal Secretions During Sexual Intercourse?

hello Dr. Jain. I would just like to ask, when my husband and i have sex and he starts to touch me so hotly, i start to release much vaginal fluids even before he pushes his penis and sometimes it also causes it to push his penis out. He is worried about it especially we want to have a baby. We are now in our 40s and we still dont have a baby. Is this a very big problem for me?