Facial in front of friends - Is it ok for boys to swim naked in front of female family members?

I Did My Best Friend A Favor By Sleeping With Her Husband While She Was Pregnant

Wife asked me to sleep with her best friend

Should I let my husband jerk off in front of my friend? She doesn't believe that he gets as big as I claim and how much he shoots. He said he would be happy to show her, but I think it may be a little too far. Should she just take my word for it?

I had sex with my husband's best friend