Does touching the private parts of a small child without a barrier invalidate the ablution?

Question:
May Allah reward you and make your knowledge beneficial. In another question, she says: If a woman performs ablution for prayer, then washes her child and touches his private parts, and he is less than five years old, does that invalidate her ablution, or is her ablution valid?

Answer:
Yes, touching the private parts invalidates the ablution, whether it is one’s own or that of another person. Touching the private parts invalidates the ablution, as in the hadith: It is the same whether the one touched is a child or an adult; if he is touched directly, whether by himself or by another, the ablution is invalidated. However, if he is touched through a barrier, that does not invalidate the ablution. Yes.