Married or not, sexual acts such as masturbation and oral/anal intercourse (wherein the sexual act is completed) are clearly wrong and to be rejected. However, if a married couple was already pregnant; would these acts still be seen as immoral?
ARGUMENT: All licit sexual activity must embrace and be open to the unitive and procreative expressions of the sexual act. While the unitive aspect of these acts may be in question, they do not possess any procreative potential, thus they must be rejected. Despite the fact that the wife is already pregnant, the act, in and of itself, must not be divorced from either aspect, practically or theoretically. Much like a couple too old to or incapable of conceiving a child, they must still retain both aspects of the sexual act while engaged as such. If it were OK for a pregnant couple to engage in illicit sexual acts because no sexual act could practically make them any more pregnant, then couples too old or infirmed would also be permitted as such.
ARGUMENT: When the wife is pregnant, no sexual act can be procreative or non-procreative, practically speaking. Thus, any and all acts could, theoretically, be considered divorced from the procreative aspect of the sexual act. Unlike a sterile couple or couple too old to conceive, the natural transmission of life for this couple is possible, desired, and, in fact, complete as they are already expecting. Unlike the previously mentioned couples who, by performing said illicit sexual acts, would completely avoid procreation, this couple is already pregnant. So, to argue that they are divorcing the procreative aspect from the sexual act seems flimsy as no act they perform will be any more or less open to life as she is already pregnant. While illicit acts (by themselves) are not procreative, do we judge the individual – who in this case is open to life, or do we judge the action – which in this case cannot make the woman any more or less pregnant.
In practice, would a married couple, who is already pregnant, be committing a sinful act if they engaged in what would otherwise be considered illicit activity?