Tim,
Whist designs may not be the best starting point for you and it may be better to look at spouse avoiding mixed doubles schedules instead. There is some relevant information on the latter here and also in the two links that you will find there. Unfortunately a full spouse avoiding schedule for 10 pairs of men and women does not exist, so I don't think I can help with an off the shelf solution for your event. However if you had 9 pairs you could use the following schedule:
Net 1 Net 2 Net 3 Net 4 Bye
(H2 W7 v H3 W4) (H4 W2 v H7 W3) (H5 W8 v H9 W6) (H6 W5 v H8 W9) (H1 W1)
(H1 W5 v H3 W8) (H4 W6 v H9 W7) (H5 W3 v H8 W1) (H6 W9 v H7 W4) (H2 W2)
(H1 W9 v H2 W6) (H4 W7 v H8 W5) (H5 W4 v H7 W8) (H6 W1 v H9 W2) (H3 W3)
(H1 W6 v H7 W5) (H2 W3 v H9 W8) (H3 W9 v H8 W2) (H5 W1 v H6 W7) (H4 W4)
(H1 W7 v H9 W3) (H2 W4 v H8 W6) (H3 W1 v H7 W9) (H4 W8 v H6 W2) (H5 W5)
(H1 W2 v H8 W7) (H2 W8 v H7 W1) (H3 W5 v H9 W4) (H4 W3 v H5 W9) (H6 W6)
(H1 W8 v H4 W9) (H2 W5 v H6 W3) (H3 W2 v H5 W6) (H8 W4 v H9 W1) (H7 W7)
(H1 W3 v H6 W4) (H2 W9 v H5 W7) (H3 W6 v H4 W1) (H7 W2 v H9 W5) (H8 W8)
(H1 W4 v H5 W2) (H2 W1 v H4 W5) (H3 W7 v H6 W8) (H7 W6 v H8 W3) (H9 W9)
Here the men are H1 to H9, and the women W1-W9. The spouse pairs H1 W1, H2 W2, etc.. never occur either as partners or as opponents, which is a feature of the schedule that you can ignore. What is important is that the schedule gives you upto 8 rounds of play (plus one bye) per player where all partners and all opponents are different.
Ian.