So chapter 19 is basically this.
If you are stuck anywhere, try this routine, it helped me.
This will lead you to 85/86.
07:00 - Choose Dress based on progress
07:00 - Knock -> Make Dinner (Orange juice)
08:00 - Kitchen, Touch Butt.
09:00 - Wait -> Spy
11:00 - Sandwich
12:00 - Sandwich
15:00 - Swim -> Excercise
16:00 - Suri event, Hold Fast/Tickle Thea as much as it lets you
17:00 - Choose Dress based on progress
18:00 - Choose Dress based on progress
18:00 - Offer her Champagne
19:00 - Spy from pool
20:00 - Dinning Room
21:00 - Talk on OnlyFancy
22:00 - Romantic Movie, carry her to bed
23:00 - Wait -> Spy
24:00 - Knock