Hi Melissa
Sorry I haven't answered this before now, I only just saw it. Your bro is welcome to post in the LTTTC & AC area of the thread or perhaps lurk if that helps him to start. We don't have a male support LTTTC & AC thread but we have had at least one male post on the LTTTC forums regularly in the recent past. Your bro would also be very welcome.

There is also the male forum area where he could post with others about anything he wanted and get support from other males on the site.

Your SIL would be welcome too.

HTH