Yes. Well.
Welcome to my life mate. Iam a single dad of 4. oldest is 8.
Started windsurfin when the ex wife dumped kids and took off 2 yrs ago.
I am fortunate that my new partner loves the beach but not so the wind.
To answear your question, I think you have to get them ( the wife ) involved.
I bought mine a kyack ,( she tried SUP). I stay on the beach building sandcastles and getting the kids on the big board while she's out then i go out and practice some light wind stuff.
When we get home she's rapt cause where done stuff together as a sort of family. then i get to out in the arvo when the wind is stronger.
Ultimatly the go is to get her windsufin.

For my last b'day present she gave me 10 " I.O.U. windsurf sessions." tokens. Cool as.

I also do all the bitch jobs around home as well as look after the 3 yr old. Thats my job, Iam their dad, but gets me sum brownie points.
Sumtimes I'll take kids with me after school to the beach and rig up and when the GF finishes work we meet up and she takes the kids and i can get a couple of hours in.
End of the day mate it's all about compromise.
I dont get to go out anywhere near the amount i'd like to. (or need to).
But when i do io love every moment, make the most of it and are always the last one out of the water.
Windsurfin has kept me sane and keeps me stoked to be alive..

Hope you can get out there..