I commonly wake up to find my wife playing with herself to the point of moaning in her sleep. This happens maybe 1 or 2 times a week. We have sex maybe once a fortnight or less as she says she is not interested in sex because of her hormones (I would like intercourse once every couple of days). I have offered to masturbate her and asked her to show me what she wants but she denies what she is doing in the night even though I wake her up. What can I do as she is very defensive about it. I have tried joining in but she aggresively move my hand away without waking up. Any ideas?