Mrs DRJAD has been flying with me from Sherburn on several occasions since various licences came my way. I think her attitude can be summed up in a few sentences:
a) she can take it or leave it: flying is enjoyable but non-essential
b) she's happy to fly with me if i) I'm properly qualified for the type of flying we are to do, and ii) I'm in current practice.
And, no, I haven't put words into her mouth, she's a very logical person and said these things to me, entirely unprompted!
Sister-in-law and her husband have been up, too: he was very interested in the rotorcraft at Sherburn, and I would not be surprised if he decides to take lessons at some point.
Parents-in-law adamantly refuse to get anywhere near any kind of aircraft no matter who is flying it!