This doesn’t make sense to me. If a woman is pregnant, how could sex during her pregnancy be ordered to procreation? Can a pregnant woman get doubly pregnant? And of course the reason for using the condom during pregnancy where there is a possibility of Zika infection is indeed to make the sex “safer”.
(a) If the actors do not act in such a way as to thwart the procreative teleology of the sexual act then I believe they may be said to be open to life and the act is left unhindered and so left ordered to procreation by the nature of the genital powers involved.
(b) Whether the genital powers of any particular couple are actually fertile or not in this act is therefore irrelevant. That is not the couple’s responsibility.
However, from this last observation (b) some conclude that having moral certainty about the infertility of one’s wife (ie pregnancy) still has no bearing on (a).
That is, use of a condom in pregnant sex is still a case of (a) above.
I find this opinion theologically ludicrous.
The use of a condom in this situation is not thwarting the known, particular here and now, actual teleology of the sexual powers of this specific couple at this specific time. So the purpose of using a condom cannot, on objective grounds, be a contraceptive one either.
Which is indeed the case, its to protect the fetus from harm while engaging in legitimate non fertile sex…
Opponents of this view understand “procreative teleology” in an idealised,abstract, universalised, non specific understanding of the sexual powers. They are not interested in specific instances or whether fertile potential is actually active at any given time. The sexual powers just by the fact they are “sexual” have by definition a teleology in the sexual act that may never be physically impeded.
This contrary view about the use of condoms is of course quite correct when the partners cannot be certain that their sex is not fertile (ie for natural reasons).
But when the partners know for certain procreation is not on the table…these two contrary understandings no longer converge and we have disagreement over the use of condoms.
I go for condoms being OK in pregnant sex because this model makes more sense of what is actually going on. It readily explains that the actors have no contraceptive intent hidden or explicit at all - they just want to enjoy unitive sex and protect their fetus.
The alternative “theology” disagrees. It states the couple are not open to life and have a hidden intent to thwart its creation in some sort of abstract sense even if not at this time.
That to me is the sort of non-falsifiable belief that leads to madness.