Suggestions or Ideas?

[Ranai]

aleria, would you perhaps like to specify a little more what categories of ideas you and your wife/Mistress are looking for?

Roleplay scenarios, positions, dress ideas, humiliation techniques, pain techniques...etc. etc. ...?

These generalised 'looking for ideas' queries are really difficult to answer. As you can see in the My BDSM Life and Knowledge Base threads, it tends to be much easier to come up with ideas when a thread is devoted to specific questions, themes, categories, toys, techniques and so forth.

About the idea of her watching you serve a third person / other persons, which purely on a fantasy level I can relate to - sounds sexy!!
You mention that you would not like to involve other partners, but are interested in the idea of playing with someone else. Do you mean that you will be looking for casual play partners locally, who might oblige to jump in once in a while, without building a long-term relationship? (In that case, obviously, you'll need to protect yourselves from the STD risk.) Or are you thinking about ideas how to simulate a third person's presence, with a blindfold and sound effects or such perhaps?