Yes, we all want to say "So this is exactly
why it is best to just keep the knife away in the first place...."
(Especially me having the personal experience I've shared below.) But at this point, an angry 'I-told-you-so' isn't going to solve anything.... At least not until the adhesion is solved, then it might
be time for a gentle
'I told you so' to reinforce that us 'crazy intactivists' aren't so crazy after all, and maybe get her to join our ranks.
First, she needs to figure out what type of 'adhesion' the boy has...
As already mentioned, if the adhesion involves the circumcision wound/scar line, it should probably be released. This is because it is two wounds trying to heal together just like two sides of a cut on your finger would heal together. In this instance it is the circumcision wound (cut) itself and the wounded glans from where the foreskin was forcefully torn off in the first stages of the procedure. As this type of adhesion develops, it often forms a "skin bridge" between the glans and the outer shaft skin, overtop of (bypassing) the inner foreskin. These can be of varying degrees from just a thread-size attachment to a complete circle of attachment all the way around the glans. Because of the way this type of wound healing occurs, it is fairly permanent and will likely not separate on its own. I know this is true because I had one of these myself, and it remained strongly
attached until I had it separated when I was about 20.
: The main problem with this is that as the boy's 'package' grows during puberty, the skin bridge can cause the skin to become extremely tight with erections - painfully tight in some instances. I was lucky in the sense that my bridge was small, and (being a 'shower') there was enough looseness that it was only somewhat tight with erections. But it would definitely hurt if for some reason ...
... it was pulled too tight. Tell her to do a Google image search for "skin bridge" to visualize this type. If this is what it is, it should be remedied (cut with anesthesia) as soon as possible to avoid these painful complications as his penis develops/grows. Also, getting it done sooner leaves the doctor a better chance of seeing and cutting on the very narrow amount of 'new skin' instead of deviating into either the glans or the remaining foreskin and leaving a divot/tag.
The other type of adhesion, where only the inner foreskin has reattached to the glans, and you can usually see the actual cut-wound-scar is not attached, is generally just the normal glans-foreskin connections reattaching themselves. This is not the same type of healing described above, and they will usually separate on their own just as they would have if the boy was left intact.
Hope this helps!