Thank you.
At 1386, Richard II mentioned Mortimer as a possible heir but did not actually confirm Mortimer as his heir with a bill.
I was speaking in regards to having a mistress. Plenty of pious kings avoided them but plenty also did have many mistresses. So i think there is a case for Richard II not being sterile.
Thanks for that tidbit. Do you by chance have the source, I'm curious if there is anything else interesting in Anne's letters.
Regarding Mortimer, I tend to think that Richard II was suspicious of both Mortimer and Bolingbroke but preferred Mortimer to Bolingbroke. As long as they were both around, Richard II could hope for them to oppose each other and didn't have to be aggressive against either. But once Bolingbroke was exiled, Richard II's relationship with Mortimer soured. I do think it is likely that Richard II wanted to arrest Mortimer for failing to carry out his orders and presumably being treasonous. However, I doubt Richard II wanted to kill him since he did not want Bolingbroke to inherit the throne and Bolingbroke was still alive and an adult compared to Mortimer's children. With Bolingbroke dead, we may see Richard II kill Mortimer since he doesn't have to worry about Bolingbroke getting the throne. However, I do not thinK Richard II would publically execute Mortimer. Instead, Richard II is more likely to have Mortimer murdered as he had Gloucester murdered. Or most probably Richard II could just put Mortimer in life imprisonment like Warwick.
If Mortimer imprisoned, Richard II will have Mortimer's sons and Bolingbroke's sons are his wards sorta similar to OTL and then should Richard II not produce his own son, he can either use Edward III or Edward I's entail to choose whichever branch he feels is more loyal to him.